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HomeMy WebLinkAboutTIC 2020-09-21 Item 2D - Agreement - 42nd Avenue South Bridge Replacement with TranTech Engineering https://tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/2020 Agenda Items/TIC 09-21-2020/04. 42nd Ave S Br Replacement 30% Design/Info Memo_PE TransTech_2020_09_21.docx INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committee FROM: Hari Ponnekanti, Interim Public Works Director BY: Adam Cox, Transportation Project Manager CC: Mayor Ekberg DATE: September 18, 2020 SUBJECT: 42nd Avenue South Bridge Replacement Project No. 91810404 Design Consultant Selection and Agreement ISSUE Execute an agreement with TranTech Engineering, LLC (TranTech) for plans and engineering services for the 42nd Avenue South Bridge Replacement Project for either 30% plans and engineering estimate (P&E) or 100% plans, specifications, and engineering estimate (PS&E). BACKGROUND In February of 2020 both the Transportation and Infrastructure Committee (TIC) and the full Council were presented with three options for moving forward with the 42nd Ave South Bridge Replacement. It was decided at the February 24, 2020 Committee of the Whole Meeting that Option 3 was preferred. Option 3 included starting design up to the 30% level, which facilitates the City exploring funding options and being adequately prepared to solicit grant funds from both the State and Federal governments. Option 3 also included an in-depth structural inspection of the bridge to illustrate the internal configuration/deterioration of the steel components of the bridge. The in-depth inspection took place on July 22 through July 24, 2020 and the results will be presented to TIC in a separate agenda item. Upon selecting Option 3 to prepare the 30% design, staff initiated the Request for Qualifications process that is required under federal and state protocol in order to be considered in compliance and eligible for future federal grant requirements. The City advertised in the Seattle Times and the Daily Journal of Commerce on April 28 and May 5, 2020 and four design firms submitted proposal packages on May 19, 2020. Two firms were invited to interview, and TranTech was the highest-rated firm from the selection process. The City then requested that TranTech submit a scope of work and cost estimate for 30% P&E and 100% PS&E. A traffic count study was performed to get a better understanding of the current usage of the 42nd Ave South Bridge and the surrounding side streets. It also gave an understanding of local impacts and reroutes if the bridge should ever be closed to traffic. The counts illustrated the importance of the structure even at a time of reduced traffic due to COVID-19 restrictions. The traffic counts showcased that before and after the inspection, approximately 7,400 vehicles crossed the bridge daily. The number was reduced to an average of 5,000 vehicles during the inspection (the bridge was closed for an 8-hour period during the inspection) and it was open to traffic during nighttime hours. Please see the attached traffic data for details. DISCUSSION The City owns and operates the 42nd Ave South Bridge and is required to maintain the infrastructure as the sole owner of the bridge. The 42nd Ave South Bridge was constructed in 1949 and has continued to carry vehicular traffic and load-restricted truck traffic for approximately 20 years beyond its designed lifespan. Per the inspection report, this critically deficient bridge should be repaired or replaced. Further analysis indicated that a complete bridge rehabilitation would cost approximately the same, if not more, than a full replacement of the structure due to the bridge’s configuration and the bridge’s inadequacy to carry current truck loadings. 31 42nd Ave South Bridge Replacement September 18, 2020 Page 2 https://tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/2020 Agenda Items/TIC 09-21-2020/04. 42nd Ave S Br Replacement 30% Design/Info Memo_PE TransTech_2020_09_21.docx The 30% P&E package, which Council initiated by selecting Option 3 in February 2020, gives the City the opportunity to be “grant ready.” Being grant-ready means having early (30%) design plans and engineering estimates and a Type, Size and Location (TS&L) report. The TS&L report will describe various options such as alternative conceptual designs as well as locations for proposed structures. The TS&L will enable the City to give clear direction to TranTech, when the City selects one of the listed options. One conceptual option that will be included in the TS&L report is building a new bridge at South 124th Street. This option would require additional exploration and coordination, but this is the time to analyze all possibilities. A new bridge at S 124th Street will allow the 42nd Ave South Bridge to remain operational during construction of a new bridge. However, this will take more coordination to incorporate the existing East Marginal Way with new traffic control, which is beyond the scope of the bridge replacement. With this concept, the City would have the opportunity to apply for funding that is non-bridge related and more transportation related. By moving the replacement bridge structure, additional transportation infrastructure can be updated to keep traffic flowing through the area. TranTech Engineering has also presented the scope of work and a cost estimate to perform 100% PS&E. Please note, the 100% scope of work and cost estimate is subject to change once the bridge design and location is selected. The 100% “shovel ready” PS&E package will include all the required permits and advertisement-ready plans needed to begin the bridge replacement project and advertise for construction bids. FINANCIAL IMPACT Council in February was informed that the approximate costs to perform the in-depth inspection was $39,000 and there was sufficient budget in the Annual Bridge Inspection CIP Program. The 30% design was estimated at $1.0 million and would require at least six months to complete from the date the contract was awarded. Budget for the $1M would be funded from the $680k Solid Waste Utility tax and $320k from the General Fund. TranTech’s attached scope of work and cost estimate for a “grant ready” 30% design P&E is $1,078,487.00 which includes $98,044.00 in management reserve/contingency. The cost estimate for a complete “shovel ready” 100% design PS&E is $2,330,488.00, which includes $211,863.00 in management reserve/contingency. Note, the 100% design cost estimate has the ability to change due to multiple unknowns of the final 42nd Ave South Bridge replacement configuration. See attached proposed 2021 CIP sheet for the full funding breakdown. Design Estimate City Funding Grants/Solid Waste 30% Design Contract Estimate $1,078,487.00 $428,000 $650,000 100% Design Contract Estimate $2,330,488.00 $980,000 $1,350,000 The 100% design option is the most time and cost-efficient choice. There will be options for stopping points at 30%, 60% and 100% of the design if needed. The 100% option would allow the City an opportunity to present a shovel ready project sooner to granting agencies and state/federal representatives. Grant Funding Information The City continues to research funding opportunities beyond the Local Bridge Program grant and is exploring other possible funding partners and other funding sources to accelerate the replacement of the 42nd Ave South Bridge. Public Works staff has applied for design funding from the Puget Sound Regional Council that would have been available in 2023 for $1,500,000; however, we found that the project was not recommended to move forward by PSRC. We have also met with representatives from the Washington State Freight Mobility Strategic Investment Board (FMSIB) and have maintained contacts at BNSF, who have expressed eagerness to assist the City with transportation and freight movement grants. In addition, the Mayor and City Administrator, with assistance from David Foster, the City’s state government lobbyist, have met with each of the members of the 11th District delegation, as well as other members in transportation leadership in both the State’s House and Senate (see list). 32 42nd Ave South Bridge Replacement September 18, 2020 Page 3 https://tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/2020 Agenda Items/TIC 09-21-2020/04. 42nd Ave S Br Replacement 30% Design/Info Memo_PE TransTech_2020_09_21.docx List of Legislators  Sen Bob Hasegawa, 11th District, Rep Steve Bergquist, 11th District, Rep Zack Hudgins, 11th District  Rep Jake Fey, Chair House Transportation Committee  Rep Javier Valdez, Vice Chair House Transportation Committee,  Rep Sharon Wylie, Vice Chair House Transportation Committee  Sen Curtis King, Ranking Member Senate Transportation Committee  Sen Joe Nguyen, Senate Transportation Committee Upcoming meetings  Sen Rebecca Saldana, Vice Chair Senate Transportation Committee  Rep Andrew Barkis, Ranking Member House Transportation Committee  Rep Vandana Slatter, Vice Chair House Transportation Committee List of Legislative Staff  Beth Redfield, House Transportation Staff  Danny Masterson, Senate Transportation staff  David Bremer, House Democratic Caucus  Hannah McCarty, Senate Democratic Caucus  State Transportation Staff  Ashley Probart, Executive Director, Transportation Improvement Board  Greg Armstrong, Transportation Improvement Board Engineer Upcoming meetings  Kyle McKeon, WSDOT Local Programs At each of these meetings the City was strongly encouraged to initiate the 30% design immediately in order to be ready for a potential voter-approved transportation package and other grants. It was made very clear that without the initial design completed, the project would not be a strong candidate for grant funding, both on the State and Federal levels. The City has previously applied for federal grants for the 42nd Ave South Bridge without first having the 30% grant ready design in-hand and was not successful. Staff has reached out to receive feedback on those applications from the granting agencies and those conversations have further reinforced that the City must prepare design at this level to compete successfully. Staff have learned that projects that are ahead in design are placed in earlier years of funding package. City staff held a meeting with Ashley Probart, the Executive Director of the Transportation Improvement Board and was told that the City would be in a significantly better position to seek funding from all granting agencies with design completed. Staff strongly believes that a 30% design, better cost estimates and considering alternating locations for the replacement bridge will make this project grant ready, improving the City’s chances to successfully receive grant funding. Some of the grant options are:  Local Bridge Program (formally known as BRAC) Federal grant programs (BUILD grant)  State grant programs, including Public Works Board Transportation Improvement Board (TIB) and  Washington Freight Mobility Strategic Investment Board (FMSIB). In addition, as mentioned above, there remains at least some interest in Olympia to explore a voter-approved transportation package in the next few years. This project could be very viable for inclusion, particularly given its impact on regional freight mobility and the fact that the City has a strong partner, with influence in Olympia, in BNSF. 33 42nd Ave South Bridge Replacement September 18, 2020 Page 4 https://tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/2020 Agenda Items/TIC 09-21-2020/04. 42nd Ave S Br Replacement 30% Design/Info Memo_PE TransTech_2020_09_21.docx RECOMMENDATION Local governments play a key role in funding, operating, and maintaining local roads, bridges, airports, transit facilities, drinking water, sewer systems, and other types of infrastructure. The City has an obligation to maintain its current infrastructure. Replacement options for the 42nd Ave South Bridge are needed at this time. Safety must be of paramount concern in the design, construction, maintenance, and traffic operations of the City’s infrastructure. It is also in the City’s economic benefit to create a comprehensive and coordinated maintenance/replacement program to facilitate freight movement between and among local, national and international markets. A significant bridge replacement project like this will take several years to get designed and constructed. Given the low sufficiency rating of the existing bridge structure, proceeding with the design will make sure that we will have adequate time to replace the bridge before fatigue deterioration due to the truck traffic. There are two recommended options for making progress on this project. Staff would like Council’s consideration of both options listed below: 1. Council is being asked to approve, at a minimum, the 30% design P&E contract with TranTech Engineering, LLC, in the amount of $1,078,487.00 for the 42nd Ave South Bridge Replacement Project. 2. Council is also being asked to consider 100% design in the amount of $2,330,488.00, with possible stopping points at 30%, 60% and 100% of the design. Depending on the decision made by TIC at the September 21 meeting, staff is seeking direction for the next steps for Options 1 or 2 and to consider this item at the September 28, 2020 Committee of the Whole. Attachments: 1 Proposed 2021 CIP 2 Consultant Scoring Sheet 3 Traffic Counts 4 TranTech Bridge 30% Scope of Work and cost estimate 5 TranTech Bridge 100% Scope of Work and cost estimate 6 2020 Legislative Agenda 34 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2021 to 2026 PROJECT:Project No. 91810404 DESCRIPTION: JUSTIFICATION: STATUS: MAINT. IMPACT: COMMENT: FINANCIAL Through Estimated (in $000's)2019 2020 2021 2022 2023 2024 2025 2026 BEYOND TOTAL EXPENSES Design 19 200 878 1,252 2,349 Land (R/W)30 30 Const. Mgmt.250 1,650 1,650 3,550 Construction 7,800 7,800 15,600 TOTAL EXPENSES 19 200 878 1,252 280 9,450 9,450 0 0 21,529 FUND SOURCES Awarded Grant 0 Proposed BRAC Grant 6,000 6,000 12,000 Proposed STP Grant 1,000 1,000 2,000 Proposed TIB 1,500 1,500 3,000 Proposed FMSIB 500 500 Solid Waste Utility Tax 650 700 700 710 720 549 4,029 City Oper. Revenue 19 200 228 552 (420)240 (270) (549)00 TOTAL SOURCES 19 200 878 1,252 280 9,450 9,450 0 0 21,529 STP funding has 13.5% match requirement. BRAC funding would be at 80% match for up to $12 million. Project partners may include FMSIB & BNSF Railroad as they have over 1,800 trips a day on the 42nd Ave S Bridge and it is the only ingress/egress available for their intermodal yard. Also State TIB for $3M. 42nd Ave S Bridge Replacement Design and construct a replacement structure for the existing 42nd Ave S Bridge near the Tukwila Community Center. Council approved 30% design with City funding of $1M in 2020, remaining scheduled in 2022. The current bridge has a sufficiency rating of 7.6 (out of 100), is load restricted for AASHTO Type 3 trucks and is structurally deficient. Truck speed was reduced to 15 mph in 2018. In 2017 and 2019, Bridge Replacement Advisory Committee (BRAC) funding was submitted, but not awarded. Staff will apply for future BRAC funding during the next call. Applying for STP funding in 2020 for $1.5m for design. New bridge. 2021 - 2026 Capital Improvement Program 9 35 Consultant Selection Approach to DBE GoalProject Understanding and ApproachQualifications/Expertise of Project ManagerQualifications/Expertise of TeamExperience with Utility and Third Party CoordinationSubtotalInterviewTotalRank42nd Ave S Bridge Replacement Submitter 20 30 20 20 10 100 200 KPFF 45 75 47 58 21 309 555 Average Score 15.0 25.0 15.7 19.3 7.0 82.0 77.3 138.8 Henry 15 25 17 18 8 83 80 163 Hari 15 20 15 20 5 75 72 147 Adam 15 30 15 20 8 88 86 174 Peter 71 71 TranTECH 47 72 58 57 30 320 584 Average Score 15.7 24.0 19.3 19.0 10.0 88.0 80.0 146.0 Henry 14 27 20 19 10 90 90 180 Hari 15 20 20 20 10 85 80 165 Adam 18 25 18 18 10 89 78 167 Peter 72 72 SCJ Alliance*30 50 37 36 13 0 166 Average Score 10.0 16.7 12.3 12.0 4.3 55.3 #DIV/0!#DIV/0! Henry 10 22 12 11 5 60 Hari 10 20 10 10 5 55 Adam 10 8 15 15 3 51 Peter 1 2 36 Approach to DBE GoalProject Understanding and ApproachQualifications/Expertise of Project ManagerQualifications/Expertise of TeamExperience with Utility and Third Party CoordinationSubtotalInterviewTotalRank42nd Ave S Bridge Replacement RHC Engineering*48 49 49 48 15 0 209 Average Score 16.0 16.3 16.3 16.0 5.0 69.7 #DIV/0!#DIV/0! Henry 15 14 16 15 5 65 Hari 15 15 15 15 5 65 Adam 18 20 18 18 5 79 Peter *Did not interview 37 0 50 100 150 200 250 300 350 400 450 12:00 AM02:00 AM04:00 AM06:00 AM08:00 AM10:00 AM12:00 PM02:00 PM04:00 PM06:00 PM08:00 PM10:00 PM12:00 AM02:00 AM04:00 AM06:00 AM08:00 AM10:00 AM12:00 PM02:00 PM04:00 PM06:00 PM08:00 PM10:00 PM12:00 AM02:00 AM04:00 AM06:00 AM08:00 AM10:00 AM12:00 PM02:00 PM04:00 PM06:00 PM08:00 PM10:00 PMPre-Inspection Hourly During Inspection Hourly Post-Inspection HourlyAverage VolumeVehicle Classification (Segregated by Type) 42nd Avenue S Average Hourly Volumes (Segregated by Type) Motor Bikes Passenger Vehicles Trucks 38 City of Tukwila 42nd Ave S Bridge Replacement Page 1 of 32 EXHIBIT A CITY OF TUKWILA 42ND AVE S BRIDGE REPLACEMENT PHASE 1 SCOPE OF WORK Background: This project will replace the existing City of Tukwila’s (City) 42nd Ave South Bridge with a new multi-span bridge. The existing 42nd Ave South was built in 1949. It is a 3-span bridge that is 280-foot-long (30’:220’:30’) and 28-feet wide (24’ curb-to-curb) with the main span consisting a through-truss that spans over the Duwamish River. T he existing bridge has a sufficiency rating of 7.56 SD and is considered Structurally Deficient and Functionally Obsolete. The 2018 Average D aily T raffic volume (ADT) was 10,300 vehicles per day with 30% of those vehicles being heavy trucks. The 42nd Ave South Bridge is a primary crossing of the Duwamish River for the Allentown neighborhood, the Burlington Northern Santa Fe (BNSF) Intermodal Facility, and the Baker Commodities Facility which are considered as major stakeholders of this project. Improving the level of service is extremely important on the 42nd Ave South Ave. as it serves in excess of 10,000 vehicle per day with 30% of those vehicles being trucks and it is the only viable route for container trucks entering and leaving the Tukwila BNSF Intermodal Facility. The Bridge on this important roadway facility is not only narrow, only 24 feet curb to curb, but also has many structural deficiencies and is currently load posted, restricting the free movement of that freight. City of Tukwila desires to replace the existing bridge structure with a new bridge and has tasked TranTech Engineering, LLC’s team (TranTech) to preparing a Type, Size, & Location Report (TS&L) and 30% Plans and Estimate (P&E) as part of the Phase 1 of this project. It is TranTech’s understanding that Phase 2 services consisting of 60%, 90%, and 100% Plans, Specifications, & Estimate (PS&E) submittals, bid ready documents and environmental permitting documentation for the bridge will be supplemented to the TranTech’s contract following completion of the Phase 1 services at a future date. Furthermore, the City of Tukwila reserves the right to retain the services of TranTech’s team for Phase 3 of the project consisting of construction phase engineering services and construction inspection and management. All work performed by TranTech’s team shall be in accordance with the WSDOT Local Agency Guidelines (LAG) Manual for federally funded projects, in anticipation of receiving future federal funding. The following work elements present a summary of the services associated with Phase 1 of the project: 39 City of Tukwila 42nd Ave S Bridge Replacement Page 2 of 32 Phase 1 Scope Summary: 1. Project Management 2. Surveying 3. Preliminary Geotechnical Engineering 4. Environmental Permitting (preapplication) 5. Bridge Aesthetics & Landscape 6. Utility Engineering and Coordination 7. Constructability Review, Construction Schedule & Estimation 8. Traffic Control & Traffic Signal 9. Illumination 10. Community Outreach 11. Type, Size & Location Report 12. 30% Plans, & Estimate (P&E) Future anticipated work as a contract supplement: • 60%, 90%, 100% and Bid-ready PS&E • Completion of permitting documentation • Ad-ready Construction Documents • Construction Phase Services Reports and plans, to the extent feasible, shall be developed in accordance with the latest edition and amendments of the following guidelines and documents: • AASHTO 2001, “A Policy of Geometric Design of Highways and Streets” • Washington State Department of Transportation, “Standard Specifications for Road and Bridge Construction” • Washington State Department of Transportation, “Design Manual” • Washington State Department of Transportation, “Bridge Design Manual” • AASHTO LRFD Bridge design Specifications – Seventh Edition • Washington State Department of Transportation, “Materials Laboratory Outline” • Washington State Department of Transportation, “Construction Manual” • Washington State Department of Transportation, “Local Agency Guidelines” • Highway Research Board’s Manual entitled “Highway Capacity” • United State Department of Transportation and Federal Highway Administration (FHWA) “Manual on Uniform Traffic Control Devices for Streets and Highways” • Standard drawings prepared by City shall be used as a guide in all cases where they fit design conditions. • AASHTO “Guide for the Development of Bicycle Facilities” • WSDOT Highway Runoff Manual • WSDOT Hydraulics Manual • King County 2016 Edition of the King County Surface Water Design Manual (KCSWDM) 40 City of Tukwila 42nd Ave S Bridge Replacement Page 3 of 32 WORK ELEMENT 1 PROJECT MANAGEMENT: This work element includes administration of the contract between the Consultant and the City, preparation of monthly progress reports and quality control, necessary for the Project. The task includes all administrative services needed to coordinate with the sub-consultant/s and to complete the Project on time and within budget. The following are the categorized activities associated with this work element: • Project Schedule Updating. • Meetings and Meeting Minutes – approximately 12 team meetings are assumed for the duration of the design activities. • Monthly Progress Reports, and Invoicing. Progress reports will contain a narrative that identifies and describes significant activities performed in the previous month and the significant planned activities for the upcoming month. • Design Team Management: a. Schedule and coordinate with design team. b. Prepare sub-consultant agreements, coordinate, budget and review the project progress and submittals. c. Prepare, monitor, and update project schedule. Monitor project budget. d. Prepare monthly billings, progress reports, and updated monthly project schedule. e. Maintain regular informal contact telephone discussions, and electronic mail. f. Obtain, with assistance from the City, rights of entry necessary for geotechnical studies, etc. Deliverables: • Progress Reports • Meeting Minutes • Monthly Invoicing • Project Schedule 41 City of Tukwila 42nd Ave S Bridge Replacement Page 4 of 32 WORK ELEMENT 2 SURVEYING: This Work Element is performed by 1-Alliance to provide topographic survey and engineering basemaps of the existing 42nd Ave South Bridge and its surroundings, including pick-ups of flagging for Ordinary High-Water Mark (OHWM) of the river and topo mapping of the river bank 100 feet east and west of the existing bridge and 500 feet north and south approaches. Survey shall extend laterally to the apparent right-of-way. Below please find Exhibit A, Surveying Limits. 2.1 Survey PM, Admin, QA/QC This task includes the survey project management, administrative duties, and quality control required for a project of this complexity and magnitude. 2.2 Survey Control This task includes the establishment of survey control, or the recovery of existing survey control, as required for the project. Survey control will be set, found, or referenced utilizing Real Time Kinematic (RTK) GPS (GNSS) and the Washington State Reference Network (WSRN) in conformance with industry standards. This survey control is then propagated, as required, utilizing standard terrestrial total station measurements. 2.2.1 Geodetic Survey Control 2.2.1.1 Survey work shall reference the Washington State Plane Coordinate System of 1983 as established in accordance with Chapter 58.20 Revised Code of Washington. 2.2.1.2 Vertical Datum shall reference the North American Vertical Datum of 1988 (NAVD88). 2.2.2 Cadastral Survey Control 2.2.2.1 Public Land Survey System monumentation required for right-of-way resolution. 2.3 Field Surveying and Mapping This task includes the field surveying and mapping required for this specific effort. Topographic– approx. 1500 linear feet along 42nd Ave South and intersections of adjoining streets. The consultant shall locate and map visible features necessary for the creation of an engineering design base map. Typical features include: 2.3.1 Topographic and Planimetric, including channelization. 2.3.2 Edge of Pavement, gravel, grass, concrete, etc. 2.3.3 Curb and sidewalk, including curb cuts and ADA ramps. 2.3.4 Signs and signals, poles and appurtences. 2.3.5 Trees, 4” in diameter or greater, and edges of significant vegetation. 2.3.6 Walls, rockeries, and fences (or faces of). 2.3.7 Ground measurements to generate a digital terrain model at one-foot contours. 2.3.8 Visible improvements situated within the described mapping limits. 2.3.9 Bridge abutment as-builts and soffit elevations. 42 City of Tukwila 42nd Ave S Bridge Replacement Page 5 of 32 2.4 Utility Surveying Services This task includes the mapping of utilities throughout the survey limits. The Consultant shall arrange for underground ‘conductible’ utility locating, by means of a private utility firm. 2.4.1 Surface Observable: power poles, vaults, risers, fire hydrants, water valves/meters, gas valves, traffic signal/traffic control boxes, and overhead utility lines. 2.4.2 Stormwater and Sanitary sewer structures shall be located. Standard efforts will be made for obtaining pipe invert elevations, size, and materials. 2.5 Office Processing This task includes the office processing of the collected survey data, data extraction, field book reductions, CADD drafting, and other duties required for the generation of the deliverable(s). For 3D laser scanning efforts, sub-tasks include the registering of point clouds; evaluating the registrations; exporting the point cloud data to Civil3D; creating or picking of appropriate points in Civil3D; Linework and Layering, and standard CADD drafting of the deliverables, as required. 2.6 Right-of-Way and Boundary Resolution(s) 2.6.1 Right-of-Way – Resolve right-of-way within the project limits. 2.6.2 Parcel Resolution – Resolve boundaries for parcels Assumptions: • Rights-of-Entry will be provided by the City. • Traffic control, if required, will be implemented and billed as an invoiced ODC. • Tree Tags, driplines/canopies are not a part of the scope services. • Setting of property corners is not a part of the scope of services. • A record of Survey is not a part of the scope of services. • Up to 60 Ordinary High-Water Mark flags, set by others, to be located. • Title reports with underlying documents for parcels to be provided by the CITY. Deliverables: • Topographic Survey with 1-foot contour intervals (electronic copy). • AutoCAD Surfaces (DTM Files) (electronic copy) or any other desired electronic source file. • ASCII file of control points. 43 City of Tukwila 42nd Ave S Bridge Replacement Page 6 of 32 Exhibit A, Surveying Limits 44 City of Tukwila 42nd Ave S Bridge Replacement Page 7 of 32 WORK ELEMENT 3 GEOTECHNICAL ENGINEERING: This Work Element, the purpose of which is to provide preliminary geotechnical engineering recommendations and reporting to support the design team, will be performed by Landau Associates, Inc. The preliminary geotechnical engineering effort will include the following activities: 3.1 Review Existing Geotechnical Information Consultant will review readily available existing subsurface exploration data for the project area. This will include a review of subsurface information previously gathered by others as part of the nearby King County Allentown Trunk and Sound Transit Central Link Light Rail projects. The purpose of reviewing this data is to facilitate the planning of the Consultant’s subsurface exploration program and incorporate geotechnical information from previous explorations into the Consultant’s preliminary geotechnical design considerations and recommendations. The data review will also include a review of published geologic and topographic information for the project area. 3.2 Geotechnical Support Related to Preparation of the TS&L Report Consultant will evaluate the above described information collected by others from the project area in order to develop preliminary geotechnical engineering conclusions and recommendations related to preparation of the TS&L Report. Preliminary geotechnical engineering conclusions and recommendation will be prepared for a replacement bridge that is located within the corridor that the existing bridge is currently located, as well as within the South 124th Street corridor. 3.3 Geotechnical Investigation Program To characterize subsurface soil and groundwater conditions along the selected bridge alignment, Consultant will subcontract a drilling contractor to advance up to four exploratory borings at or near the proposed bridge foundation locations using a track-mounted drill rig. The Consultant’s cost estimate includes budget to advance two borings each to a depth of about 90 ft below ground surface (bgs) and two borings each to a depth of about 60 ft bgs. The Consultant’s cost estimate also includes budget to subcontract a small tracked excavator to clear brush and/or create relatively level working surfaces for the drill rig. The Consultant’s cost estimate also includes budget to stabilize areas of disturbed ground with mulch or straw at the completion of the subsurface investigation. Finally, the Consultant’s cost estimate includes budget to obtain access permission from King County for the two borings that will be advanced along or adjacent to the Green River Trail. A geotechnical representative of the Consultant will observe the advancement of the exploratory borings, obtain soil samples from the borings, and prepare field logs of conditions observed. Soil samples will be obtained from the exploratory borings on about a 2½- or 5-ft depth interval using the Standard Penetration Test (SPT) procedure. The soil samples will be delivered to the Consultant’s laboratory for further examination and classification. Soil samples obtained from the exploration will be held in the laboratory for 30 days after submittal of the final report. After that date, the soil samples will be disposed of unless arrangements are made to retain them. While monitoring wells are not planned for the proposed borings, groundwater occurrence will be noted on the summary boring logs. Upon completion of sampling and logging, the borings will be decommissioned in accordance with the requirements of Chapter 173-160 of the Washington 45 City of Tukwila 42nd Ave S Bridge Replacement Page 8 of 32 Administrative Code (WAC). Excess cuttings from the exploratory borings will be properly disposed of offsite. If present, the pavement section at borehole locations will be patched using fast setting concrete. Prior to performing the above described field activities, Consultant will arrange for underground utility location (“call before you dig”). Consultant will also hire a private utility locating service to check for the presence of buried utilities at planned boring locations. Consultant will complete a geotechnical laboratory testing program consisting of natural moisture content and grain size and/or Atterberg Limits determinations on selected soil samples to aid in classifying site soils. Laboratory testing will include up to 30 moisture content determinations and 16 grain size distributions or Atterberg limits determinations. 3.4 Preliminary Geotechnical Engineering Analysis Consultant will evaluate the information collected as part of the above described data review and field investigation program in order to develop preliminary geotechnical engineering conclusions and recommendations related to the preliminary design (i.e. 30 percent) of the proposed replacement bridge. 3.5 Draft and Final Preliminary Geotechnical Reports Deliverables will include a draft geotechnical report containing preliminary geotechnical conclusions and recommendations. A final preliminary geotechnical report will be created that contains the results of mutually agreed upon consolidated comments from other team members and the City. The preliminary geotechnical reports will include the following information: • Summary logs and a site plan showing the locations of the exploratory borings advanced by the Consultant. • Seismic design criteria in accordance with applicable AASHTO standards. • A preliminary qualitative evaluation of the liquefaction and lateral spread hazards at the project site, if warranted. If such hazards exist at the project site, a detailed evaluation of the liquefaction and lateral spread hazards would need to be performed during a subsequent design phase of the project. • Recommendations for site preparation and fill placement, including: criteria for clearing, stripping and grubbing; an evaluation of the suitability of on-site soil for use as structural fill; gradation criteria for imported fill; guidance for preparation of subgrade soil, which will support the bridge approaches; and criteria for structural fill placement and compaction. • Geotechnical recommendations for the preliminary design of deep foundations for the proposed replacement bridge, as well as temporary foundation support for the existing bridge if it will be used as a temporary bridge during construction of the replacement bridge. The recommendations will include preliminary estimates of the following: tip elevation, axial resistance, downdrag loads and loss of side resistance during seismic loading, uplift resistance, lateral shaft analysis, and construction considerations. • Lateral earth pressure criteria for design of proposed bridge abutment walls and permanent retaining walls including equivalent fluid densities for the active, at-rest and passive states of stress. 46 City of Tukwila 42nd Ave S Bridge Replacement Page 9 of 32 • A discussion related to known or anticipated geotechnical issues that should be considered during final design of the project or that could influence construction of the replacement bridge. The discussion will include methods to mitigate such issues, if identified. • Recommendations for supplemental geotechnical services to support final design of the proposed replacement bridge. 3.6 Meeting Participation For estimating purposes, it is assumed that the Consultant’s geotechnical engineer will participate in up to three internal meetings with the design team for consultation during preliminary design of the project. Assumptions: • The replacement bridge will consist of a two or three-span structure with no in water foundation elements. • The replacement bridge will be located either within the corridor that the existing bridge is currently located or within the South 124th Street corridor. • Permits will not be required to clear brush and/or create relatively level working surfaces for the drill rig. • Consultant will not need to provide preliminary foundation design recommendations for more than 3 different foundation options. • Additional exploratory borings may be required if during the design process the locations of the bridge foundations change. Deliverables: • An electronic (Adobe PDF) copy of the draft Preliminary Geotechnical Report • An electronic (Adobe PDF) copy of the final Preliminary Geotechnical Report 47 City of Tukwila 42nd Ave S Bridge Replacement Page 10 of 32 WORK ELEMENT 4 ENVIRONMENTAL PERMITTING (PREAPPLICATION): This Work Element will be performed by Landau Associates, Inc. to provide environmental permitting documentation for preapplication support for the National Environmental Policy Act (NEPA), the State Environmental Policy Act (SEPA), and local permits/approvals. Federal funding is anticipated to be administered through WSDOT Local Programs. Consultant therefore assumes that the WSDOT will be the lead coordinator for NEPA. For the purposes of this Scope of Services, Consultant assumes that this project can be authorized under a NEPA Categorical Exclusion (CE). The necessary work elements associated with preapplication documentation are assumed to be: 4.1 Wetland/Waterway Delineation Consultant will conduct wetland delineations in accordance with the US Army Corps of Engineers (USACE) 1987 Wetlands Delineation Manual and the 2010 USACE Regional Supplement to the Wetland Delineation Manual. The ordinary high-water mark (OHWM) of waterways will be delineated using guidance provided in Ecology’s Determining the Ordinary High-Water Mark on Streams in Washington State. The high tide line for the Duwamish River, which is tidally influenced in the project area, will be obtained from available tide gauge data and field observation. Consultant will compile and review environmental information from readily available public domain resources to gain a general understanding of potential wetland issues at the site. Public domain resources include, but are not limited to: • Natural Resources Conservation Service Soil Survey data • National Wetlands Inventory mapping • Local Critical Areas mapping • US Geological Survey topographic mapping • Recent aerial photography. The field investigation will include an examination of vegetation, soils, and hydrology within the project area for two alternative alignments. Flagging will be placed along the wetland/waterway boundaries and will be confined to the project area. Any wetland/waterway habitat that extends beyond the project area, and within 200 ft (referred to as the study area), will be estimated both visually and using public domain resources to assess extent. Included in this task is time to provide the project surveyors with a hand-sketch of wetland/waterway boundaries to assist the surveyors to locate project flagging. Consultant also included time to review the survey map and request any necessary changes to accurately represent existing wetland/waterway conditions. Wetlands within the study area will be rated in accordance with Ecology’s Washington State Wetland Rating System for Western Washington, and buffer widths will be determined in compliance with applicable Critical Areas regulations. Stream typing and buffer widths will be based on Chapter 18.45 of the TMC, and the water typing system promulgated in WAC 222-15- 131. Consultant will prepare a draft Wetland and Waterway Delineation Technical Memorandum for the selected alternative with the information obtained from field delineation and ratings. The memorandum will be acceptable to the City for shoreline permitting and other regulatory agencies that will include: • A summary of the methodology used 48 City of Tukwila 42nd Ave S Bridge Replacement Page 11 of 32 • The size and rating of each wetland and waterway; a characterization of wetland vegetation, soils, and hydrology; and field data sheets • A scaled site map showing the locations of wetland/waterway boundaries and buffers, locations of wetland data plots, and site topography • Supporting photographs. The draft memorandum will be provided to the City for review. Comments will be reviewed and incorporated, as appropriate, into a final Wetland and Waterway Delineation Technical Memorandum. The delineation report memorandum will be used in pre application meetings for the purposes of discussing potential project impacts and determining agency jurisdiction. This task includes efforts to summarize wetland/waterway delineation results, including figure, for two project alternatives for use in the Type, Size, and Location report. 4.2 WSDOT Local Program National Environmental Policy Act Categorical Exclusion Form Consultant will prepare a preliminary version of the WSDOT Local Programs NEPA Categorical Exclusion (CE) Form (formerly the Local Agency Environmental Classification Summary). The purpose of the preliminary NEPA CE form is to facilitate discussion with WSDOT Local Programs to determine subsequent NEPA compliance needs. To complete the preliminary version of the CE form, Consultant will compile and review environmental information from readily available public domain resources to gain a general understanding of relevant environmental resources along the project corridor. 4.3 Agency Preapplication Meetings Consultant will assist in scheduling and participate in pre-application meetings, as needed, with the City, Washington State Department of Transportation (WSDOT), Washington Department of Fish & Wildlife (WDFW), Washington Department of Natural Resources (DNR), US Army Corps of Engineers, and US Coast Guard to coordinate jurisdictional limits and permit conditions for the project. This task includes participation in at least two onsite meetings, three conference calls and associated correspondence to support preapplication inquiries. 4.4 Permit Matrix Consultant will prepare a permit matrix identifying all anticipated environmental permits and a rough schedule including required reviews, duration of reviews by agencies, public notice or comment periods, public outreach requirements, hearings, and other permit related timing constraints. The permit matrix will evaluate permit needs for no more than two alternatives. Assumptions: • The proposed project will receive funding from the FHWA administered through WSDOT Highways and Local Programs. 49 City of Tukwila 42nd Ave S Bridge Replacement Page 12 of 32 • The preliminary NEPA CE form will only be prepared for the selected bridge alignment. • The preliminary NEPA CE form will identify individual discipline reports anticipated to be prepared for the project. Development of discipline reports is not included in this scope of services. • The City will provide access permissions if needed. • Wetland/waterway boundary flagging will be placed only in accessible parts of the project area. • Permit matrix will be limited to environmental permits related to SEPA, NEPA and Shoreline compliance, and will not include construction permits, building permits, or stormwater permits. Deliverables: • An electronic (Adobe PDF) copy of the preliminary NEPA CE form • An electronic (Adobe PDF) copy of the draft and final Wetland and Waterway Delineation Technical Memorandum. • An electronic (Adobe PDF) copy of the permit matrix 50 City of Tukwila 42nd Ave S Bridge Replacement Page 13 of 32 WORK ELEMENT 5 BRIDGE AESTHETICS & LANDSCAPE This Work Element is performed by Makers to provide Bridge Aesthetics and Landscaping design. The following outlines the tasks associated with this work: 5.1 Concept Design for Urban Design Elements a. Review engineering work, site constraints, existing City policies and activities relevant to the project. Assist as requested regarding street configuration and relationship to adjacent properties. Meet with City Staff and Consultant Team to discuss opportunities, constraints and ideas. (Follow-up with selected Staff and team members may be necessary b. Sketch preliminary concepts c. Review with staff (one meeting) and engineering team and refine the concepts. d. Assist Enviro-issues with public open house. (Event time only) e. Review results of the open house with the Staff/Consultant team. f. Work up preferred ideas to a 30% design level for aesthetic and landscaping features. Provide drawings in a format compatible with the engineering documents. (Format provided by the engineering team.) Provide narrative description of urban design and/or outline g. Prepare 30% design level quantity estimate and opinion of cost estimate for the selected aesthetic and landscaping features. Assumptions: • City and Enviro-issues will organize the open house and publicize and arrange for the meetings and presentations. Makers will assist in conducting the sessions. • Makers will not be involved in lighting, electrical or utilities work. • The budget assumes 6 meetings or conferences with the engineering/City team and one public event (open house). • The engineering team will provide Makers with CAD layouts, templates and numbering to meet the requirements of the final bid document formatting. Deliverables: • Concept sketches for the open house • 30% Documents of urban design (Aesthetic) and landscaping elements in digital format (CAD) as provided by the engineering team. 51 City of Tukwila 42nd Ave S Bridge Replacement Page 14 of 32 WORK ELEMENT 6 UTILITY COORDINATION This Work Element is performed by TranTech to provide utility coordination and potentially design for the project. 6.1 Utility Coordination Utilities owned and operated by other agencies/entities, other than the City, that are within the project corridor of the bridge improvements will be identified. TranTech will acquire and review record drawings of existing utilities within the project limits and define potential utility conflicts. For the purpose of preparing this scope of work, it is anticipated that up to four (4) utilities are located in the project corridor. Known utilities within the project limits include Puget Sound Energy (PSE) Gas and Electric, Comcast, King County Wastewater Treatment Services and Seattle City Light (SCL). TranTech will schedule meetings with utility owners to discuss the project and define utility needs and design criteria if the utility is impacted by the proposed bridge improvements. A total of four (4) meetings are anticipated under this subtask. Meeting will be conducted by, and minutes will be prepared by TranTech. Prepare Memorandum - Prepare a short technical memorandum to outline all the findings on the utilities at and around the project site. Assumptions: • No utility design is part of this Work Element Deliverables: • Utility coordination memorandum 52 City of Tukwila 42nd Ave S Bridge Replacement Page 15 of 32 WORK ELEMENT 7 CONSTRUCTABILITY REVIEW, AND ESTIMATION: This work element is performed by Ott-Sakai Construction Consultants (OS), to provide constructability review, construction schedule, and construction estimation services. The work element includes the following activities: 7.1 Constructability review and Cost Estimation OS will provide constructability review and cost Estimation of the design team’s prepared TS&L Report and Plans, & Estimate (P&E) package at 30% design level. Deliverables: • Constructability Review and Estimation for TS&L Report. • Constructability Review and Estimation for 30% P&E design level. 53 City of Tukwila 42nd Ave S Bridge Replacement Page 16 of 32 WORK ELEMENT 8 - TRAFFIC CONTROL AND TRAFFIC SIGNAL: This work element is performed by Transpo Group, Inc. (Transpo) to provide traffic analysis, traffic control, detour, and traffic signal plans for the Contractor’s use in constructing the proposed bridge and roadway improvements. 8.1 Traffic Analysis Transpo will evaluate existing and future traffic conditions as described within this subsection at the following intersections: • 42nd Ave S/Interurban Ave S • 42nd Ave S/S 124th St • Interurban Ave S/S 124th St • Interurban Ave S/Access Roadway Transpo will coordinate with the City to identify appropriate evaluation criteria for comparing and analyzing potential improvement options. Future Demand It is assumed that the Puget Sound Regional Council (PSRC) travel demand model will be used to develop future year traffic projections at the study intersections identified above. The Consultant will coordinate with the Client to identify an appropriate existing year and design year for analysis. Traffic Operations and Level-of-Service Synchro (Traffic Signals) and aaSidra (Roundabouts) software will be utilized to analyze existing and future traffic operations, queue lengths, and levels-of-service at the study intersections. The purpose of this analysis will be to establish baseline and future no-build conditions for vehicle delay, level-of-service, and travel times through the intersection for vehicles, transit vehicles, and non-motorized users. Evaluate Options It is assumed that the following improvement options will be evaluated: • Option 1 – S 124th St Bridge – Traffic Signal o S 124th St is connected to Interurban Ave S with a new bridge across the Duwamish River. o A new traffic signal is installed at the S 124th St/Interurban Ave S intersection. o The north leg at the 42nd Ave S/Interurban Ave S intersection is removed. o The existing signal at 42nd Ave S/Interurban Ave S is modified as needed and the Interurban Ave S/Access Roadway intersection is signalized, if warrants are met. • Option 2 – S 124th St Bridge – Roundabout 54 City of Tukwila 42nd Ave S Bridge Replacement Page 17 of 32 o S 124th St is connected to Interurban Ave S with a new bridge across the Duwamish River. o A new roundabout is installed at the S 124th St/Interurban Ave S intersection. o The north leg at the 42nd Ave S/Interurban Ave S intersection is removed. o The existing signal at 42nd Ave S/Interurban Ave S is modified as needed and the Interurban Ave S/Access Roadway intersection is signalized, if warrants are met. • Option 3 – 42nd Ave S Bridge – Existing Condition The options will be evaluated against previously established evaluation criteria to help refine and prioritize the potential improvement options for each intersection. In cooperation with the Client and project team, a scoring matrix will be developed with appropriately weighted evaluation criteria for the purpose of rating and prioritizing improvement options. Conceptual Drawings of Improvements The Consultant will develop conceptual drawings of Options 1, 2, and 3 utilizing survey data (if available) and/or readily available aerial imagery. The conceptual drawings will represent an approximately 10 percent design level. Summary Report The Consultant will prepare a final report that summarizes the results of the traffic analysis, evaluation of alternatives, and the Project Team’s recommendations. Following one round of comments from the Client, the report will be finalized. Deliverables: • Concept drawings • Summary traffic analysis report 8.2 Traffic Control The Consultant will prepare traffic control plans, special provisions, and engineer’s opinion of cost for constructing the proposed bridge and roadway improvements. Attend a total of 3 team meetings to discuss what type and duration of closures are needed for which phase of the bridge reconstruction. Attend up to 2 neighborhood meetings to present and discuss closure plans. The exact limits of the traffic control will be determined jointly between the City and the Consultant; however, the initial scope and fee are based on the listed assumptions below. The plans will conform with MUTCD and/or WSDOT/City procedures and standard plans. 55 City of Tukwila 42nd Ave S Bridge Replacement Page 18 of 32 Assumptions: • The limits, details, and types of traffic control plans are unknown at the time of contracting. The Consultant has budgeted to provide up to three generic short-term traffic control plans, and one specific traffic control plan to include: o TCP 1: Short term plan, including pedestrian and vehicle detour plan as needed o TCP 2: Short term plan, including pedestrian and vehicle detour plan as needed o TCP 3: Short term plan, including pedestrian and vehicle detour plan as needed o TCP 4: Short term – full closure of Green River Trail plan, including detour plan • It is assumed that others will prepare all civil-related plans for temporary traffic control. This includes, but is not limited to, the design of temporary curbs, sidewalks, paving, grading, utilities, drainage, structures, geotechnical design, and related work. • Traffic analysis is not included in task 8.2. • Special provisions are not included in the Phase 1 deliverables/fee Deliverables: • Traffic Control packages for TS&L design level. 8.3 Traffic Signal Design Transpo will prepare traffic signal plans, and engineer’s opinion of cost for constructing traffic signal improvements/modifications for the project. Assumptions: • The traffic signal design deliverables/fee is based on Option 1 from sub-task 8.1. • The existing traffic signal at the 42nd Ave S/Interurban Ave S intersection will continue to operate during construction and temporary signal modifications will not be required. • Temporary traffic signals will not be required during construction at the S 124th St/Interurban Ave S, 42nd Ave S/S 124th St, and/or Interurban Ave S/Access Roadway intersections. • Permanent signal improvements at the 42nd Ave S/Interurban Ave S intersection are anticipated to primarily include: o Removing the existing mast arm and traffic signals for southbound 42nd Ave S traffic o Modifying the existing phasing and traffic signals for northbound 42nd Ave S traffic to be left turn signal heads only o Removing pedestrian signal heads and pushbuttons for crossing the north leg of the intersection • Permanent signal improvements at the Interurban Ave S/Access Roadway intersection are anticipated to primarily include: o Fully signalizing the intersection to be tied into the existing traffic signal system at the 42nd Ave S/Interurban Ave S intersection 56 City of Tukwila 42nd Ave S Bridge Replacement Page 19 of 32 • Permanent signal improvements at the S 124th St/Interurban Ave S intersection are anticipated to primarily include: o Fully signalizing the intersection • Existing traffic signal controller and service cabinets will not be impacted by the project and will remain in operation as-is • Special signal pole foundation design is not anticipated • Transformer and/or electrical service connection design is not anticipated • It is assumed that others will prepare all civil-related plans for temporary traffic control. This includes, but is not limited to, the design of curbs, sidewalks, paving, grading, utilities, drainage, structures, geotechnical design, and related work • Special provisions are not included in the Phase 1 deliverables/fee • Wire termination details and pole chart details are not included in the Phase 1 deliverables/fee Deliverables: • Traffic Signal packages for TS&L and 30% design levels. 57 City of Tukwila 42nd Ave S Bridge Replacement Page 20 of 32 WORK ELEMENT 9 ILLUMINATION: This work element is performed by TranTech, to provide preliminary illumination design services. TranTech team will prepare for illumination and signing preliminary design for 30% P&E design level. Based on the City’s selected Alternative, TranTech will provide design services associated with illumination, and permanent signing design. The illumination design is intended for the Bridge and its immediate approaches. TranTech team will prepare 30% plans, and engineering cost estimates. This work element includes the following tasks: 9.1 Illumination The design team will discuss guidelines and criteria with the City. The team will develop a design basis report outlining the lighting design approach, AGi32 software, design criteria, target luminance and luminance levels, power densities, wiring schematics, sources (discuss with the PUD service types and locations), color temperature and control intent. Following the input from the City, the lighting engineer will develop illumination P&E, lighting schedules and provide required fixture catalog cuts. Assumptions: • The bridge will have full illumination for bicycles, pedestrians and vehicles. • The approaches will have full illumination and transition to existing conditions as required. Deliverables: • Illumination P&E at 30% design levels. 58 City of Tukwila 42nd Ave S Bridge Replacement Page 21 of 32 WORK ELEMENT 10 COMMUNITY OUTREACH: This work element is performed by EnviroIssues and TranTech to provide Community Outreach services in the TS&L Phase. Community outreach will be broken into two phases: Phase 1: Early engagement and coordination (at project initiation) During Phase 1, EnviroIssues will focus on building relationships with key stakeholders, establish local avenues for project communications and develop a plan for outreach. EnviroIssues will also develop initial project messaging and materials. Outreach will include interviews and briefings with key stakeholders and community organizations to gather initial feedback about the project, potential solutions, decision criteria and tradeoffs and outreach approach. Phase 2: Technical options and tradeoffs (with draft TS&L/pre 30% design) During Phase 2, EnviroIssues will focus outreach efforts on broader public engagement to gather feedback on the technical options, potential tradeoffs and impacts, and decision criteria to identify a preferred solution. Outreach will include stakeholder briefings, an online open house, an in - person public event and broad public notification. 10.1 Community outreach plans Objectives Through collaboration with the project team, City and the surrounding community, EnviroIssues will create an overall community outreach plan and phase-specific plans that set outreach goals, methods and messaging. Activities/Approach • EnviroIssues will do initial research into the community, including previous and current engagement and a demographic analysis to help guide the outreach approach. • EnviroIssues will create a general community outreach plan that sets the overall project goals, messaging, etc. • EnviroIssues will develop outreach plans for phase 1 and 2, outlining goals and strategies specific to each phase that allows us to build in flexibility as the project team learns more about community needs. Assumptions • EnviroIssues will lead development of community outreach plans and update consistently as community needs are better understood. Deliverables • General community outreach plan, assumes 2 rounds of review, to be updated up to 2 times • Phase 1 community outreach plan, assumes 2 rounds of review, to be updated up to 2 times • Phase 2 community outreach plan, assumes 2 rounds of review, to be updated up to 2 times 10.2 Stakeholder interviews, briefings and phone calls Objectives 59 City of Tukwila 42nd Ave S Bridge Replacement Page 22 of 32 In the light of Covid 19 restrictions and in partnership with the project team, EnviroIssues will support City staff to schedule, develop questions and materials for, conduct, and document stakeholder interviews through website and webinar facilitations and/or phone briefings for Phases 1 and 2. Outreach to stakeholders will include area residents, businesses, community and cultural organizations, and others. The purpose of the initial interviews and follow-up briefings will be to further understand community interests, concerns and priorities related to the bridge replacement and how the community would like to stay informed and engaged during this and future phases of the project, including pre-construction and construction phases. The interviews, briefings and phone calls provide an opportunity for key stakeholders to share their unique perspectives on the project issues and potential solutions prior to broader community outreach. The interviews, briefings and phone calls also provide an opportunity for the City to get ahead of and/or proactively address stakeholder concerns and questions prior to outreach to the broader public and share how stakeholder input has been used to inform City decisions. Activities/Approach • EnviroIssues, with the support of the project team, will identify project stakeholders and tailor an engagement approach that best suits individual stakeholder needs. • A phased approach to direct engagement will be used starting with 1) interview, 2) briefings and gather feedback and correspondence to close the loop with stakeholders. • Stay Home, Stay Safe orders will be considered when determining which engagement approach to use. Assumptions • Representatives from the City and consultant team will attend online interviews and briefings. • EnviroIssues will facilitate scheduling interviews and briefings, either in person or via online platforms. • EnviroIssues will draft meeting minutes and additional notes. • Time billed to attending in-person activities includes up to 30 minutes of travel each way. • EnviroIssues will record feedback received during these outreach activities in Task 10.3. Deliverables • Assume up to 6 stakeholder interviews and summaries • Assume up to 6 briefings and summaries • Assume up to 10 emails • Assume up to 10 phone calls and associated summaries 10.3 Online engagement Objectives Online engagement will be robust as measures to address the COVID pandemic limit in-person activities. Online engagement tools will include an online open house, project website, email correspondence and an online webinar. EnviroIssues will develop an online open house website to share project information and interact with the public. An online open house tool is particularly helpful to solicit broader public input 60 City of Tukwila 42nd Ave S Bridge Replacement Page 23 of 32 from those who are unable to attend the in-person meeting yet still have a desire to provide their input on the project. The online open house includes use of a custom sub-domain website that will be seamlessly linked from the City’s website, have a project-specific customized layout, station tabs to match in-person meeting station materials, fully responsive design (i.e. for smart phones, tablets, etc.), integration social share, and a full report of comments submitted. Activities/Approach • Develop online project-specific website within City’s website which is maintained by the City • Develop online open house to share project information and solicit community feedback • Plan and implement an online workshop to engage with community stakeholders. • Develop up-to-date content and coordinate with City to update the project website. • Correspond and share information with public via email. Assumptions • EnviroIssues will coordinate with the consultant team and City to develop content and graphics for an online open house. • EnviroIssues will use the Participate Online platform to develop the online open house. • EnviroIssues will lead online open house development and online open house updates. • EnviroIssues will coordinate translation of online open house in up to 4 additional languages. The City will be responsible for directs related to translation services. • EnviroIssues will lead planning and implementation of an online webinar to coincide with the online open house. Assume 1 preparation meeting with all participating staff. • Consultant team and City staff will attend the online webinar to provide technical and expert information. • Community comments and feedback will be collected and tracked for the duration of the online open house. Deliverables • Participate Online online open house, content updated up to 1 time. • Online open house look and feel. • Presentation for online webinar, assumes 1 round of review. • Webinar plan assumes 1 round of review. • Webinar agenda and annotation agenda assumes 1 round of review. • Webinar summary assumes 1 round of review. • Spreadsheet tracking all communications, comments, and feedback collected in this Task and task 10.2. 10.4 Outreach materials Objectives EnviroIssues will develop a suite of materials and notifications to encourage stakeholders to engage with the project and share project information. 61 City of Tukwila 42nd Ave S Bridge Replacement Page 24 of 32 Activities/Approach • EnviroIssues will develop a project look-and-feel, including branding (standards for project material color, font, etc.) and document templates, utilizing any City-established guidelines as a starting point where they are available. • EnviroIssues will develop content for the City’s project website to provide details about the project including a schedule and engagement timeline. EnviroIssues will collaborate with the City to post website content for Phase 1 and 2. • EnviroIssues will develop content and graphics for project fact sheet/FAQs, to provide an overview of the project during Phase 1 and 2 outreach phases. EnviroIssues will also collaborate with the City to provide needed materials translation/transcreation. • EnviroIssues will develop an overview presentation to be used during Phase 1 at the stakeholder interviews and an updated presentation to be used during Phase 2 for stakeholder briefings. • Materials will be translated into languages identified by the project team. • Materials will present project information, including existing conditions, an outline of ways the public can provide feedback, information about design options, and project contact information. • EnviroIssues will develop notifications for the project, including: o Content and graphics for a postcard to notify the local community about the project and upcoming Phase 2 online engagement opportunities. o Content and graphics for up to two (2) different sized display ads during Phase 2 outreach. o Content for up to three (3) email updates for the City to share with interested stakeholders. o Content and graphics for one (1) yard sign to share the online engagement site. o Content and images for up to two (2) rounds of social media content for Phase 2 outreach. Assumptions • EnviroIssues will work with the project team and City to develop content for materials. • EnviroIssues will circulate drafts of materials with the project team and City for approval before distributing to the public. • EnviroIssues will assist the project team in developing graphics, including maps, and format materials. • The City will be responsible for covering the direct costs associated with printing and mailing materials. • EnviroIssues will coordinate translations, the City will be responsible for direct costs. • The City will coordinate the posting of social media content on City social media accounts. • EnviroIssues will assist in developing project website updates in coordination with the project team. • The City will be responsible for updating the project website. • EnviroIssues will draft project updates to be sent via City listserv. Deliverables • Look and feel of outreach material in full collaboration with the City 62 City of Tukwila 42nd Ave S Bridge Replacement Page 25 of 32 • Fact sheet, assumes 1 round of review, up to 2 updates • FAQ, assumes 1 round of review, up to 2 updates • Presentation, assumes 2 rounds of review • Mailed postcards, assumes 1 round of review • Up to 2 display ads, assumes 1 round of review • Yard signs, assumes 1 round of review • Social media content, assumes 1 round of review, up to 2 updates • City-provide translated versions of final materials listed above • Draft up to 2 project website updates, assumes 1 round of review • Draft up to 2 email listserv updates, assumes 1 round of review 10.5 Outreach summaries Objectives EnviroIssues will summarize feedback heard through the three phases of community engagement activities including online engagement, interviews, briefings and phone calls, to communicate the engagement process and how community feedback was incorporated into the final design. Activities/Approach • Outline community engagement activities and objectives. • Summarize feedback. • Show how feedback was used. • Reflect on success and lessons learned of engagement activities. Assumptions • The summaries will be shared with the public and partner agencies. Deliverables • Phase 1 community outreach summary, assumes 1 round of review • Phase 2 community outreach summary, assumes 1 round of review 63 City of Tukwila 42nd Ave S Bridge Replacement Page 26 of 32 Work Element 11 Type, Size, Location (TS&L) Report: Based on the City’s input and based on the results from the engineering activities associated with work elements 1 through 11 , TranTech will provide structural, civil, roadway, and drainage engineering services with the goal of preparing a TS&L Report that satisfies current WSDOT BDM Section 2.1.5 requirements and will study up to four bridge replacement alternatives. Two alignment alternatives will be studied; one alternative will look at replacing the bridge in its existing location and one alternative will look at replacing the bridge back to its historical location between Interurban Ave S and S 124th St. Evaluation criteria for comparing different alternatives will be developed and scoping level engineering designs and cost estimates for each alternative will be provided. All activities associated with this task will be closely coordinated with the City and the design team will work as an extension of the City staff for recommending a preferred bridge replacement alternative. The following describes the design subtasks associated with this work element: 11.1 – Civil/ Roadway Design a. Alignment and Right-of-Way Plans Consultant will prepare the preliminary alignment and ROW plan to include proposed right-of-way acquisitions, proposed preliminary permanent easements layout, and proposed preliminary temporary construction easements (TCEs) layout, for each studied alternative. b. Site Preparation and Demolition Plans A preliminary Site Preparation and Demolition plan will be prepared for each of the studied alternatives. These plans will show topography, existing utilities, existing surface features and items for demolition, removal, or salvage. c. Roadway Plans & Profiles A preliminary Plan and Profile plan will be prepared for each of the studied alternatives in accordance with City and AASHTO design standards as appropriate for the projected 20- year ADT level of traffic. The City shall provide all current and historical traffic count data available to assist in determining an approximate 20-year ADT projection. It is assumed a formal traffic count will be conducted as part of this scope of work for 42nd Ave, 124th Street and Interurban Ave. For the alignment option at S 124th Street traffic modeling will be completed by the Transpo Group as described in work element 8. The modeling will be utilized to determine if a roundabout (single lane or two lane) or a signal is the best intersection option for the S 124th Street and Interurban Avenue S location. The modeling, coordination with the City and King County, and estimates for each option will be utilized for arriving at the recommended S 124th Street and Interurban Avenue S intersection option. Feasible connection options to the Green River Trail will be included. For the TS&L phase it is assumed the intersection at 42nd Ave S and S 124th Street will be a stop controlled intersection similar to other intersections along 124th Street, such as 43rd to 49th Ave S. and 64 City of Tukwila 42nd Ave S Bridge Replacement Page 27 of 32 this will not be modeled or designed for during the TS&L portion of the project. If the 124th Street location is selected, the intersection of 124th Street and 42nd Ave intersection will be designed in a future phase. d. Coordination with Districts, Utilities, and Stakeholders Construction of this project will affect multiple parties. Coordination will occur as part of Work Element 11. Additional coordination with outside utilities will occur as part of Work Element 6. Coordination with City utilities will occur with this Work Element. This element will include implementing results of Work Element 11 into the TS&L. e. Conceptual stormwater management plan Construction of a new bridge and approaches will require pavement replacement. A conceptual stormwater management approach will be developed for each project alternative to identify whether stormwater runoff treatment and/or stormwater flow control thresholds will be exceeded. For each alternative the Low Impact Development Performance Standard will be evaluated and possible scenarios for meeting this requirement will be explored. 11.2 TS&L Report Consultant will prepare horizontal and vertical alignment alternatives for the project to support the analysis of up to four bridge alignment alternatives. The horizontal alignment for the project has been determined by the existing roadway alignment. However, the exact alignment remains to be fixed based on detailed survey information. An opinion of cost will be prepared based on the alternatives. The opinion of cost will be based on unit prices and incorporate about a 30% contingency to account for the level of completeness of plan preparation, and to reflect experience on similar projects within the region. An evaluation matrix will be developed for purpose of comparing the costs, construction feasibility, staged construction flexibility, and other criteria as may be developed during the work. Selection of the preferred alternative will be made by the City stakeholders, an d the preferred alternative will be carried forward in the design. Deliverables: • Up to four alternative roadway/bridge plans and profiles • Opinion of Cost for each alternative • Evaluation matrix Design Criteria for Civil, Roadway, Stormwater, and Traffic Control Elements: Reports, plans, and estimates, to the extent feasible, shall be developed in accordance with the latest edition and amendments of the following: • City Standards and Specifications. • AASHTO 2011, “A Policy of Geometric Design of Highways and Streets; 6th Edition”; 65 City of Tukwila 42nd Ave S Bridge Replacement Page 28 of 32 • AASHTO 2004, “A Guide for Achieving Flexibility in Highway Design of Highways; 1st Edition”; • Washington State Department of Transportation, “Standard Specifications for Road and Bridge Construction”; • Washington State Department of Transportation, “Design Manual”; • Washington State Department of Transportation, “Standard Plans” • Washington State Department of Transportation, “Materials Laboratory Outline”; • Washington State Department of Transportation, “Construction Manual”; • Washington State Department of Transportation, “Local Agency Guidelines”; • Highway Research Board’s Manual entitled “Highway Capacity”; • FHWA and USDOT, “Manual on Uniform Traffic Control Devices for Streets and Highways”; • WSDOT Highway Runoff Manual; • WSDOT Hydraulics Manual; • King County – 2016 Edition of the King County Surface Water Design Manual 11.3 Structural Design Based on input from the City and engineering activities associated with work elements 1 through 11 , TranTech’s structural team will perform preliminary structural design associated with up to four viable bridge replacement alternatives for each of the investigated alignments (i.e., existing and S124th). The design will follow most current WSDOT Bridge Design Manual (BDM), AASHTO, and City requirements. Throughout the structural design activities, special care will be given to incorporate low impact design approaches like noise reduction, minimization of traffic impacts, Life Cost Analysis based on City-desired parameters, and environmental protection. Our bridge design activities start with a review of the gathered data provided by team members including survey, geotechnical, hydrology, traffic, civil, etc. Throughout our preliminary structural assessment/design of the studied alternatives, we will be in continuous communication with the City for consultations on parameters like structure location, length and vertical clearance. Also, required roadway elevations would be addressed. Our approach will be to work together with the City and our design team to address all engineering aspects of this bridge replacement project to optimally assess up to four viable bridge replacement alternatives for each of the investigated alignments. The team will recommend one alternative for a preferred alignment that possesses most of the City-desired attributes to advance to full design stage. All engineering work will be done per AASHTO LRFD Bridge Design Specifications - sixth Edition, WSDOT Standard Specifications 2020 M41-10, WSDOT Bridge Design Manual M 23- 50, June 2019 and current City Standards. 66 City of Tukwila 42nd Ave S Bridge Replacement Page 29 of 32 All data and final products will become the property of City upon project completion. All data will be provided in a mutually agreeable format. Deliverables: • Draft TS&L Report • Final TS&L Report 67 City of Tukwila 42nd Ave S Bridge Replacement Page 30 of 32 WORK ELEMENT 12 30% P&E This work element is performed by TranTech to provide 30% level P&E documentation in accordance with WSDOT LAG Manual. 12.1 30% Plans and Opinion of Cost This work element item encompasses all the activities associated with the preparation of the 30% Plans and engineer’s opinion of construction cost Estimate (P&E) documents. Constructability Review and QA/QC activities are an inherent part of this element. Assumptions: City to provide: • Title block and CAD standards Deliverables: • Two 11x17 (half size) copies of Plans. • Two copies of the quantity Estimates and opinion of construction cost. • Electronic PDF copies of the Plans and opinion of construction cost in both PDF and Excel. 68 City of Tukwila 42nd Ave S Bridge Replacement Page 31 of 32 WORK ELEMENT 13 - PHASE 2 SUPPLEMENT- AD-READY DESIGN At the discretion of the City additional design phase services may be added as a supplement to this contract. 69 City of Tukwila 42nd Ave S Bridge Replacement Page 32 of 32 WORK ELEMENT 14 - PHASE 2 SUPPLEMENT - CONSTRUCTION PHASE SERVICES: At the discretion of the City construction phase services may be added as a supplement to this contract. 70 Exhibit D - Prime Consultant Cost Computations Summary City of Tukwila - 42nd Ave S Bridge Replacement TRANTECH TEAM BUDGET BREAKDOWN TranTech 629,461$ 1 Alliance 89,614$ Landau- Geotechnical 72,328$ Landau- Environmental 31,660$ Makers 26,623$ Ott-Sakai 25,781$ Transpo 49,693$ EnviroIssues 55,283$ TOTAL PROJECT BUDGET 980,443$ MANAGEMENT RESERVE 98,044$ TOTAL CONTRACT BUDGET 1,078,487$ 71 City of Tukwila 42nd Ave S Bridge Replacement Page 1 of 41 EXHIBIT A CITY OF TUKWILA 42ND AVE S BRIDGE REPLACEMENT SCOPE OF WORK – FULL DESIGN Background: This project will replace the existing City of Tukwila’s (City) 42nd Ave South Bridge with a new multi-span bridge. The existing 42nd Ave South was built in 1949. It is a 3-span bridge that is 280-foot-long (30’:220’:30’) and 28-feet wide (24’ curb-to-curb) with the main span consisting a through-truss that spans over the Duwamish River. T he existing bridge has a sufficiency rating of 7.56 SD and is considered Structurally Deficient and Functionally Obsolete. The 2018 Average D aily T raffic volume (ADT) was 10,300 vehicles per day with 30% of those vehicles being heavy trucks. The 42nd Ave South Bridge is a primary crossing of the Duwamish River for the Allentown neighborhood, the Burlington Northern Santa Fe (BNSF) Intermodal Facility, and the Baker Commodities Facility which are considered as major stakeholders of this project. Improving the level of service is extremely important on the 42nd Ave South Ave. as it serves in excess of 10,000 vehicle per day with 30% of those vehicles being trucks and it is the only viable route for container trucks entering and leaving the Tukwila BNSF Intermodal Facility. The Bridge on this important roadway facility is not only narrow, only 24 feet curb to curb, but also has many structural deficiencies and is currently load posted, restricting the free movement of that freight. City of Tukwila desires to replace the existing bridge structure with a new bridge and has tasked TranTech Engineering, LLC’s team (TranTech) to preparing Plans, Specifications and Estimate (PS&E) of this project. Furthermore, the City of Tukwila reserves the right to retain the services of TranTech’s team for the project’s construction phase engineering services and construction inspection and management. All work performed by TranTech’s team shall be in accordance with the WSDOT Local Agency Guidelines (LAG) Manual for federally funded projects, in anticipation of receiving future federal funding. The following work elements present a summary of the services associated with full design of this project: 72 City of Tukwila 42nd Ave S Bridge Replacement Page 2 of 41 Scope Summary: 1. Project Management 2. Surveying 3. Preliminary Geotechnical Engineering 4. Environmental Permitting (preapplication) 5. Bridge Aesthetics 6. Utility Engineering and Coordination 7. Constructability Review, Construction Schedule & Estimation 8. Traffic Control & Traffic Signal 9. Illumination & Signage 10. Community Outreach 11. Type, Size & Location Report 12. Plans, Specifications & Estimate (PS&E) Future anticipated work as a contract supplement: • Construction Phase Services Reports and plans, to the extent feasible, shall be developed in accordance with the latest edition and amendments of the following guidelines and documents: • AASHTO 2001, “A Policy of Geometric Design of Highways and Streets” • Washington State Department of Transportation, “Standard Specifications for Road and Bridge Construction” • Washington State Department of Transportation, “Design Manual” • Washington State Department of Transportation, “Bridge Design Manual” • AASHTO LRFD Bridge design Specifications – Seventh Edition • Washington State Department of Transportation, “Materials Laboratory Outline” • Washington State Department of Transportation, “Construction Manual” • Washington State Department of Transportation, “Local Agency Guidelines” • Highway Research Board’s Manual entitled “Highway Capacity” • United State Department of Transportation and Federal Highway Administration (FHWA) “Manual on Uniform Traffic Control Devices for Streets and Highways” • Standard drawings prepared by City shall be used as a guide in all cases where they fit design conditions. • AASHTO “Guide for the Development of Bicycle Facilities” • WSDOT Highway Runoff Manual • WSDOT Hydraulics Manual • King County 2016 Edition of the King County Surface Water Design Manual (KCSWDM) 73 City of Tukwila 42nd Ave S Bridge Replacement Page 3 of 41 WORK ELEMENT 1 PROJECT MANAGEMENT: This work element includes administration of the contract between the Consultant and the Agency, preparation of monthly progress reports and quality control, necessary for the Project. The task includes all administrative services needed to coordinate with the sub-consultant/s and to complete the Project on time and within budget. The following are the categorized activities associated with this work element: • Project Schedule Updating. • Meetings and Meeting Minutes – approximately 20 team meetings are assumed for the duration of the design activities. • Monthly Progress Reports, and Invoicing. Progress reports will contain a narrative that identifies and describes significant activities performed in the previous month and the significant planned activities for the upcoming month. • Design Team Management: a. Schedule and coordinate with design team. b. Prepare sub-consultant agreements, coordinate, budget and review the project progress and submittals. c. Prepare, monitor, and update project schedule. Monitor project budget. d. Prepare monthly billings, progress reports, and updated monthly project schedule. e. Maintain regular informal contact telephone discussions, and electronic mail. f. Obtain, with assistance from the City, rights of entry necessary for geotechnical studies, etc. Deliverables: • Progress Reports • Meeting Minutes • Monthly Invoicing • Project Schedule 74 City of Tukwila 42nd Ave S Bridge Replacement Page 4 of 41 WORK ELEMENT 2 SURVEYING: This Work Element is performed by 1-Alliance to provide topographic survey and engineering basemaps of the existing 42nd Ave South Bridge and its surroundings, including pick-ups of flagging for Ordinary High-Water Mark (OHWM) of the river and topo mapping of the river bank 100 feet east and west of the existing bridge and 500 feet north and south approaches. Survey shall extend laterally to the apparent right-of-way. Below please find Exhibit A, Surveying Limits. 2.1 Survey PM, Admin, QA/QC This task includes the survey project management, administrative duties, and quality control required for a project of this complexity and magnitude. 2.2 Survey Control This task includes the establishment of survey control, or the recovery of existing survey control, as required for the project. Survey control will be set, found, or referenced utilizing Real Time Kinematic (RTK) GPS (GNSS) and the Washington State Reference Network (WSRN) in conformance with industry standards. This survey control is then propagated, as required, utilizing standard terrestrial total station measurements. 2.2.1 Geodetic Survey Control 2.2.1.1 Survey work shall reference the Washington State Plane Coordinate System of 1983 as established in accordance with Chapter 58.20 Revised Code of Washington. 2.2.1.2 Vertical Datum shall reference the North American Vertical Datum of 1988 (NAVD88). 2.2.2 Cadastral Survey Control 2.2.2.1 Public Land Survey System monumentation required for right-of-way resolution. 2.3 Field Surveying and Mapping This task includes the field surveying and mapping required for this specific effort. Topographic– approx. 1500 linear feet along 42nd Ave South and intersections of adjoining streets. The consultant shall locate and map visible features necessary for the creation of an engineering design base map. Typical features include: 2.3.1 Topographic and Planimetric, including channelization. 2.3.2 Edge of Pavement, gravel, grass, concrete, etc. 2.3.3 Curb and sidewalk, including curb cuts and ADA ramps. 2.3.4 Signs and signals, poles and appurtences. 2.3.5 Trees, 4” in diameter or greater, and edges of significant vegetation. 2.3.6 Walls, rockeries, and fences (or faces of). 2.3.7 Ground measurements to generate a digital terrain model at one-foot contours. 2.3.8 Visible improvements situated within the described mapping limits. 2.3.9 Bridge abutment as-builts and soffit elevations. 75 City of Tukwila 42nd Ave S Bridge Replacement Page 5 of 41 2.4 Utility Surveying Services This task includes the mapping of utilities throughout the survey limits. The Consultant shall arrange for underground ‘conductible’ utility locating, by means of a private utility firm. 2.4.1 Surface Observable: power poles, vaults, risers, fire hydrants, water valves/meters, gas valves, traffic signal/traffic control boxes, and overhead utility lines. 2.4.2 Stormwater and Sanitary sewer structures shall be located. Standard efforts will be made for obtaining pipe invert elevations, size, and materials. 2.5 Office Processing This task includes the office processing of the collected survey data, data extraction, field book reductions, CADD drafting, and other duties required for the generation of the deliverable(s). For 3D laser scanning efforts, sub-tasks include the registering of point clouds; evaluating the registrations; exporting the point cloud data to Civil3D; creating or picking of appropriate points in Civil3D; Linework and Layering, and standard CADD drafting of the deliverables, as required. 2.6 Right-of-Way and Boundary Resolution(s) 2.6.1 Right-of-Way – Resolve right-of-way within the project limits. 2.6.2 Parcel Resolution – Resolve boundaries for parcels Assumptions: • Rights-of-Entry will be provided by the City. • Traffic control, if required, will be implemented and billed as an invoiced ODC. • Tree Tags, driplines/canopies are not a part of the scope services. • Setting of property corners is not a part of the scope of services. • A record of Survey is not a part of the scope of services. • Up to 60 Ordinary High-Water Mark flags, set by others, to be located. • Title reports with underlying documents for parcels to be provided by the CITY. Deliverables: • Topographic Survey with 1-foot contour intervals (electronic copy). • AutoCAD Surfaces (DTM Files) (electronic copy) or any other desired electronic source file. • ASCII file of control points. 76 City of Tukwila 42nd Ave S Bridge Replacement Page 6 of 41 Exhibit A, Surveying Limits 77 City of Tukwila 42nd Ave S Bridge Replacement Page 7 of 41 WORK ELEMENT 3 GEOTECHNICAL ENGINEERING: This Work Element, the purpose of which is to provide geotechnical engineering recommendations and reporting to support the design team, will be performed by Landau Associates, Inc. The geotechnical engineering effort will include the following activities: 3.1 Review Existing Geotechnical Information Consultant will review readily available existing subsurface exploration data for the project area. This will include a review of subsurface information previously gathered by others as part of the nearby King County Allentown Trunk and Sound Transit Central Link Light Rail projects. The purpose of reviewing this data is to facilitate the planning of the Consultant’s subsurface exploration program and incorporate geotechnical information from previous explorations into the Consultant’s preliminary geotechnical design considerations and recommendations. The data review will also include a review of published geologic and topographic information for the project area. 3.2 Geotechnical Support Related to Preparation of the TS&L Report Consultant will evaluate the above described information collected by others from the project area in order to develop preliminary geotechnical engineering conclusions and recommendations related to preparation of the TS&L Report. Preliminary geotechnical engineering conclusions and recommendation will be prepared for a replacement bridge that is located within the corridor that the existing bridge is currently located, as well as within the South 124th Street corridor. Consultant’s geotechnical input for the TS&L report will be presented in a technical memorandum. 3.3 Geotechnical Investigation Program To characterize subsurface soil and groundwater conditions along the selected bridge alignment, Consultant will subcontract a drilling contractor to advance up to four exploratory borings at or near the proposed bridge foundation locations using a track-mounted drill rig. The Consultant’s cost estimate includes budget to advance two borings each to a depth of about 90 ft below ground surface (bgs) and two borings each to a depth of about 60 ft bgs. The Consultant’s cost estimate also includes budget to subcontract a small tracked excavator to clear brush and/or create relatively level working surfaces for the drill rig. The Consultant’s cost estimate also includes budget to stabilize areas of disturbed ground with mulch or straw at the completion of the subsurface investigation. Finally, the Consultant’s cost estimate includes budget to obtain access permission from King County for the two borings that will be advanced along or adjacent to the Green River Trail. 78 City of Tukwila 42nd Ave S Bridge Replacement Page 8 of 41 A geotechnical representative of the Consultant will observe the advancement of the exploratory borings, obtain soil samples from the borings, and prepare field logs of conditions observed. Soil samples will be obtained from the exploratory borings on about a 2½- or 5-ft depth interval using the Standard Penetration Test (SPT) procedure. The soil samples will be delivered to the Consultant’s laboratory for further examination and classification. Soil samples obtained from the explorations will be held in the laboratory for 30 days after submittal of the final report. After that date, the soil samples will be disposed of unless arrangements are made to retain them. While monitoring wells are not planned for the proposed borings, groundwater occurrence will be noted on the summary boring logs. Upon completion of sampling and logging, the boreholes will be decommissioned in accordance with the requirements of Chapter 173-160 of the Washington Administrative Code (WAC). Excess cuttings from the exploratory borings will be properly disposed of offsite. If present, the pavement section at borehole locations will be patched using fast setting concrete. Prior to performing the above described field activities, Consultant will arrange for underground utility location (“call before you dig”). Consultant will also hire a private utility locating service to check for the presence of buried utilities at planned boring locations. Consultant will complete a geotechnical laboratory testing program consisting of natural moisture content and grain size and/or Atterberg Limits determinations on selected soil samples to aid in classifying site soils. Laboratory testing will include up to 30 moisture content determinations and 16 grain size distributions or Atterberg limits determinations. 3.4 Preliminary Geotechnical Engineering Analysis Consultant will evaluate the information collected as part of the above described data review and field investigation program in order to develop preliminary geotechnical engineering conclusions and recommendations related to preliminary design (up to 30 percent) of the proposed replacement bridge. 3.5 Draft and Final Preliminary Geotechnical Reports Deliverables will include a draft geotechnical report containing preliminary geotechnical conclusions and recommendations. A final preliminary geotechnical report will be created that contains the results of mutually agreed upon consolidated comments from other team members and the City. The preliminary geotechnical report will include the following information: 79 City of Tukwila 42nd Ave S Bridge Replacement Page 9 of 41 • Summary logs and a site plan showing the locations of the exploratory borings advanced by the Consultant. • Seismic design criteria in accordance with applicable AASHTO standards. • A preliminary qualitative evaluation of the liquefaction and lateral spread hazards at the project site, if warranted. If such hazards exist at the project site, a detailed evaluation of the liquefaction and lateral spread hazards would need to be performed during a subsequent design phase of the project. • Recommendations for site preparation and fill placement, including: criteria for clearing, stripping and grubbing; an evaluation of the suitability of on-site soil for use as structural fill; gradation criteria for imported fill; guidance for preparation of subgrade soil, which will support the bridge approaches; and criteria for structural fill placement and compaction. • Geotechnical recommendations for the preliminary design of deep foundations for the proposed replacement bridge, as well as temporary foundation support for the existing bridge if it will be used as a temporary bridge during construction of the replacement bridge. The recommendations will include preliminary estimates of the following: tip elevation, axial resistance, downdrag loads and loss of side resistance during seismic loading, uplift resistance, lateral shaft analysis, and construction considerations. • Lateral earth pressure criteria for design of proposed bridge abutment walls and permanent retaining walls including equivalent fluid densities for the active, at-rest and passive states of stress. • A discussion related to known or anticipated geotechnical issues that should be considered during final design of the project or that could influence construction of the replacement bridge. The discussion will include methods to mitigate such issues, if identified. • Recommendations for supplemental geotechnical services to support final design of the proposed replacement bridge. 3.6 Final Geotechnical Engineering Analysis Consultant will finalize the preliminary geotechnical engineering conclusions and recommendations related to preliminary design of the proposed replacement bridge and develop geotechnical engineering conclusions and recommendations related to final design of the proposed replacement bridge. 3.7 Draft and Final Geotechnical Reports Deliverables will include a draft geotechnical report containing design-level geotechnical conclusions and recommendations. A final geotechnical report will be created that contains the results of mutually agreed upon consolidated comments from other team members and the City. 80 City of Tukwila 42nd Ave S Bridge Replacement Page 10 of 41 The geotechnical report will include the same information as the above described preliminary geotechnical report, plus finalized geotechnical recommendations related to liquefaction and lateral spread hazards at the project site and deep foundation design. 3.8 Meeting Participation For estimating purposes, it is assumed that the Consultant’s geotechnical engineer will participate in up to six internal meetings with the design team for consultation during design of the project. Assumptions: • The replacement bridge will consist of a two- or three-span structure with no in water foundation elements. • The replacement bridge will be located either within the corridor that the existing bridge is currently located or within the South 124th Street corridor. • Permits will not be required to clear brush and/or create relatively level working surfaces for the drill rig. • Consultant will not need to provide preliminary foundation design recommendations for more than 3 different foundation options. • Additional exploratory borings may be required if during the design process the locations of the bridge foundations change. Deliverables: • An electronic (Adobe PDF) copy of the technical memorandum with geotechnical input for the TS&L Report • An electronic (Adobe PDF) copy of the draft Preliminary Geotechnical Report • An electronic (Adobe PDF) copy of the final Preliminary Geotechnical Report • An electronic (Adobe PDF) copy of the draft Geotechnical Report • An electronic (Adobe PDF) copy of the final Geotechnical Report 81 City of Tukwila 42nd Ave S Bridge Replacement Page 11 of 41 WORK ELEMENT 4 ENVIRONMENTAL PERMITTING: This Work Element will be performed by Landau Associates, Inc. to provide environmental permitting documentation support for the National Environmental Policy Act (NEPA), the State Environmental Policy Act (SEPA), and local permits/approvals. Federal funding is anticipated to be administered through WSDOT Local Programs. Consultant therefore assumes that the WSDOT will be the lead coordinator for NEPA. For the purposes of this Scope of Services, Consultant assumes that this project can be authorized under a NEPA Categorical Exclusion (CE). The necessary work elements associated with Environmental Permitting are assumed to be: 4.1 Wetland/Waterway Delineation Consultant will conduct wetland delineations in accordance with the US Army Corps of Engineers (USACE) 1987 Wetlands Delineation Manual and the 2010 USACE Regional Supplement to the Wetland Delineation Manual. The ordinary high-water mark (OHWM) of waterways will be delineated using guidance provided in Ecology’s Determining the Ordinary High-Water Mark on Streams in Washington State. The high tide line for the Duwamish River, which is tidally influenced in the project area, will be obtained from available tide gauge data and field observation. Consultant will compile and review environmental information from readily available public domain resources to gain a general understanding of potential wetland issues at the site. Public domain resources include, but are not limited to: • Natural Resources Conservation Service Soil Survey data • National Wetlands Inventory mapping • Local Critical Areas mapping • US Geological Survey topographic mapping • Recent aerial photography. The field investigation will include an examination of vegetation, soils, and hydrology within the project area for two alternative alignments. Flagging will be placed along the wetland/waterway boundaries and will be confined to the project area. Any wetland/waterway habitat that extends beyond the project area, and within 200 ft (referred to as the study area), will be estimated both visually and using public domain resources to assess extent. Included in this task is time to provide the project surveyors with a hand-sketch of wetland/waterway boundaries to assist the surveyors to locate project flagging. Consultant also included time to review the survey map and request any necessary changes to accurately represent existing wetland/waterway conditions. Wetlands within the study area will be rated in accordance with Ecology’s Washington State Wetland Rating System for Western Washington, and buffer widths will be determined in compliance with applicable Critical Areas regulations. Stream typing and buffer widths will be 82 City of Tukwila 42nd Ave S Bridge Replacement Page 12 of 41 based on Chapter 18.45 of the TMC, and the water typing system promulgated in WAC 222-15- 131. Consultant will prepare a draft Wetland and Waterway Delineation Technical Memorandum for the selected alternative with the information obtained from field delineation and ratings. The memorandum will be acceptable to the City for shoreline permitting and other regulatory agencies that will include: • A summary of the methodology used • The size and rating of each wetland and waterway; a characterization of wetland vegetation, soils, and hydrology; and field data sheets • A scaled site map showing the locations of wetland/waterway boundaries and buffers, locations of wetland data plots, and site topography • Supporting photographs. The draft memorandum will be provided to the City for review. Comments will be reviewed and incorporated, as appropriate, into a final Wetland and Waterway Delineation Technical Memorandum. The delineation report memorandum will be used in pre application meetings for the purposes of discussing potential project impacts and determining agency jurisdiction. This task includes efforts to summarize wetland/waterway delineation results, including figure, for two project alternatives for use in the Type, Size, and Location report. 4.2 WSDOT Local Program National Environmental Policy Act Categorical Exclusion Form Consultant will prepare a preliminary version of the WSDOT Local Programs NEPA Categorical Exclusion (CE) Form (formerly the Local Agency Environmental Classification Summary). The purpose of the preliminary NEPA CE form is to facilitate discussion with WSDOT Local Programs to determine subsequent NEPA compliance needs. To complete the preliminary version of the CE form, Consultant will compile and review environmental information from readily available public domain resources to gain a general understanding of relevant environmental resources along the project corridor. 4.3 Agency Preapplication Meetings Consultant will assist in scheduling and participate in pre-application meetings, as needed, with the City, Washington State Department of Transportation (WSDOT), Washington Department of Fish & Wildlife (WDFW), Washington Department of Natural Resources (DNR), US Army Corps of Engineers, and US Coast Guard to coordinate jurisdictional limits and permit conditions for the project. 83 City of Tukwila 42nd Ave S Bridge Replacement Page 13 of 41 This task includes participation in at least two onsite meetings, three conference calls and associated correspondence to support preapplication inquiries. 4.4 Permit Matrix Consultant will prepare a permit matrix identifying all anticipated environmental permits and a rough schedule including required reviews, duration of reviews by agencies, public notice or comment periods, public outreach requirements, hearings, and other permit related timing constraints. The permit matrix will evaluate permit needs for no more than two alternatives. 4.5 Hazardous Materials Linear Corridor Screening LAI will conduct a screening-level assessment of sites along the project corridor for the potential presence of contamination. The screening-level assessment of the project corridor will include the following components: • Review available aerial photographs to assess past uses of the project corridor and adjacent properties from the present back to their first developed use, or back to 1940, whichever is earlier. • Review listings from a subcontracted database service (Environmental Data Resources Inc.) of confirmed and suspected contaminated sites within a 1-mile radius of the project corridor abstracted from US Environmental Protection Agency (EPA), tribal, and Ecology environmental databases. • Review reports documenting previous environmental investigations completed at sites along the project corridor (if available from the City and/or WSDOT). • Conduct a site reconnaissance of the project corridor to visually and physically observe current land-use activities and environmental conditions. • LAI will request and collect information from Ecology to further evaluate the sites of potential hazardous and problem waste concerns for the project that were identified in the regulatory database search or site reconnaissance, if any. This task will include: o Visit Ecology’s Northwestern Regional office in Bellevue, Washington to review documents available from the agency files and to request copies of relevant information related to environmental conditions at sites along the project corridor o Review/photocopy pertinent documents/information. The data collected will be summarized in a technical memorandum provided in electronic (Adobe PDF) format. 84 City of Tukwila 42nd Ave S Bridge Replacement Page 14 of 41 4.6 Section 7 of the Endangered Species Act (ESA) Biological Assessment (BA); Magnuson-Stevens Act Essential Fish Habitat (EFH) Evaluation LAI will prepare a BA for selected species federally listed as threatened or endangered in the action area under the ESA and an EFH Evaluation for the proposed project. LAI will obtain updated species lists from agency websites, request site-specific species and habitat information from the WDFW Priority Habitats and Species database, and review information from the Washington Natural Heritage Program. Evaluation of specific project details, such as construction techniques and equipment used, timing of construction, and best management practices (BMPs) will be based on information provided by TranTech. The report will establish the project action area, which incorporates the furthest extent of both aquatic and terrestrial impacts. Appropriate environmental baseline information and species history will be summarized in the BA. A determination of “no effect” (NE) or “may effect, not likely to adversely affect” (NLAA) is anticipated. The project is not expected to impact EFH. LAI will prepare a draft BA and EFH for review and comment by TranTech and the City, and then a final document. 4.7 Cultural Resources LAI will identify the Area of Potential Effects (APE) in accordance with 36 CFR 800.16(d) and coordinate with the Local Program Engineer and WSDOT archeologist for on the APE request and a Section 106 exemption. 4.8 Section 4(f) Documentation LAI will prepare the WSDOT Section 4(f) De Minimis Impact Determination form. The form will provide: • A project description • A description of Section 4(f) resources (i.e., park and/or historic sites) affected by the project and proposed impacts (including figure) • A summary of public outreach efforts. LAI will prepare a draft form for review and comment by TranTech and the City, and then a final document. 85 City of Tukwila 42nd Ave S Bridge Replacement Page 15 of 41 4.9 Traffic Noise Assessment LAI will conduct a traffic noise assessment for the project corridor, for potential noise impacts to sensitive receivers within the project study area. The traffic noise assessment will include the following components: • Site Reconnaissance: An initial site visit will be performed to identify potential noise sensitive receptors along the project corridor. • Pre-Consultation with WSDOT: Before conducting field work or TNM noise model development, we will consult with WSDOT noise specialists to confirm the appropriate number of modeling receptors and noise validation measurement locations. • Noise Measurements for TNM Model Validation: Noise measurements for the proposed project will be collected along select existing and proposed roadway/bridge segments that may be affected by the proposed project where frequent human use is likely to occur. Data collection will be used for model validation as part of the Noise Assessment. • Noise Assessment: Noise levels shall be predicted for the existing road/bridge (the “no- build” alternative) and one “build” alternative. The City planning department will be consulted to determine the locations where dwellings have been issued building permits in currently vacant lots adjacent to the roadway/bridge. A land use inventory shall be performed to identify the existing and currently-permitted future noise-sensitive land uses and to assist in selection of noise modeling locations. Representative receiver locations shall be modeled for prediction of noise levels and determination of noise impacts. LAI will incorporate provided traffic data into the model. The traffic noise impact criteria against which the Project traffic noise levels are evaluated are taken from WSDOT’s Traffic Noise Assessment & Abatement Policy guidance manual. • Noise Barrier Analysis: If the noise analysis indicates impacts in areas where noise barriers (or building acoustical insulation) is constructible, then we will use the TNM model to design the height and length of noise barrier walls that satisfy WSDOT’s acoustical feasibility criteria. For each wall we will estimate the construction cost by using WSDOT’s unit cost factor, and we will determine the economic reasonableness based on the number of benefited receptor locations shielded. Based on inspection of preliminary aerial photographs, for budgetary purposes we assume will evaluate up to 4 separate noise walls. We will coordinate with the civil engineering design team to provide the required heights, top elevations, and lengths of each noise wall that satisfies both the feasibility and reasonableness criteria. • Noise Discipline Report: LAI will compile a technical report summarizing the findings of the noise study. The contents shall include land use in the area, existing noise conditions, methods of analysis, impacts and all evaluated noise mitigation measures. Mitigation cost estimates shall be included. Construction noise impacts shall be discussed. The report shall include maps of the existing and proposed alignments and existing and future land uses on a scale vicinity map. Comparative tables shall be prepared to aid in understanding 86 City of Tukwila 42nd Ave S Bridge Replacement Page 16 of 41 Project impacts and mitigation. A draft report will be submitted to the City for review. Based upon the comments, LAI will revise the report and a WSDOT-review draft copy will be delivered to WSDOT. We will respond to WSDOT comments to prepare the final report. The traffic noise analysis will be summarized in a technical report. 4.10 Permit Applications LAI will prepare a Joint Aquatic Resources Permit Application (JARPA) form and documentation as required by the TMC for a shoreline substantial development permit. The JARPA form will be submitted to WDFW for Hydraulic Project Approval, to the USACE for Section 404/Section 10 permitting, to Ecology for Section 401 Certification, US Coast Guard for bridge permit, and DNR in support of aquatic lands lease, and to the City for shoreline permitting. LAI will complete the City’s Shoreline Permit application and associated documentation a figure for property owners within 500 ft of the project area. Mailing list labels and other administrative tasks will be coordinated by the City. Information required as part of the application also includes five copies of the following: • Description of project consistency with decision criteria • Vicinity map • Shoreline site plans (top of bank, landward catch point toe of levee, riverbank toe, mean high water mark, and 100-year base flood elevation, appropriate setbacks, maintenance easements, limits of construction) • Sensitive area study documentation and plans • Cross sections • Landscape plans • Civil plans (stamped, signed, and dated by licensed professional engineer). LAI will prepare the City of Tukwila Tree Clearing Permit application, which will be included with the Shoreline Permit application package. The “description of project consistency with decision criteria” listed above will include reference to the City’s tree regulations. 4.11 Mitigation/Landscape Plan Support This task consists of the design support services necessary to prepare and complete design drawings that will be required for impacting the shoreline buffer of the Duwamish River. LAI will provide comments to TranTech for incorporation of buffer mitigation into the landscape plans relevant to the mitigation plan at the 60 percent, 90 percent, and 100 percent levels. 4.12 Agency Coordination LAI will help TranTech and the City respond to agency comments on application submittals and provide support with inquiries on agency status of reviews. 87 City of Tukwila 42nd Ave S Bridge Replacement Page 17 of 41 The agencies may require additional data about potential environmental impacts and their mitigation. Support will be provided via teleconference and email. Assumptions: • The proposed project will receive funding from the FHWA administered through WSDOT Highways and Local Programs. • The NEPA CE form will only be prepared for the selected bridge alignment. • NEPA documentation prepared in association with federal funding will be adopted as the State Environmental Policy Act (SEPA) environmental analysis pursuant to WAC 197- 11-630 and Chapter 21.04.230 of the Tukwila Municipal Code (TMC). • The City will provide access permissions if needed. • Wetland/waterway boundary flagging will be placed only in accessible parts of the project area. • Permit matrix will be limited to environmental permits related to SEPA and NEPA compliance, and will not include construction permits, building permits, or stormwater permits. • A Hazardous Materials Discipline Report to address hazardous and problem waste may be required by WSDOT based on its review of the preliminary NEPA CE form. Preparation of a Hazardous Materials Discipline Report is not included in this scope of services. The level of detail and report format for a Hazardous Materials Discipline Report is dependent on the project activities, and type and number of potential hazardous material impacts identified. A scope and cost estimate to complete a Hazardous Materials Discipline Report, if required by WSDOT, will be provided following receipt of review comments from WSDOT regarding the preliminary NEPA CE form. • The hazardous materials corridor screen technical memorandum will not meet the requirements of a Phase I environmental site assessment under ASTM E1527-13. • Building interiors will not be accessed as part of the site reconnaissance. • LAI assumed that 10 hours of historical environmental document review will be sufficient to come to general conclusions about the recognized environmental conditions that affect the subject properties. If additional review time is required, LAI will bring this to your attention in advance of continuing the review. • File reviews at the agency level are experiencing extensive delays due to COVID 19 limitations and may require 6 months or more to complete. • Conditions at immediately adjoining properties may not be observable from public access areas and, as a result, may not be identified during the site reconnaissance. • The BA will be drafted using the current WSDOT template. • A 30% to 60% level of design will be sufficient for preparation of the BA and EFH Evaluation report. 88 City of Tukwila 42nd Ave S Bridge Replacement Page 18 of 41 • The project will have a NE or NLAA determination on listed species and/or their designated critical habitat and a formal Biological Opinion will not be required. The project will have no adverse impact to EFH. • WSDOT BA procedures for calculating the extent of in-water impacts will be used; however, this task does not include water quality modeling using CORMIX modeling software. • This task does not include meetings with agency staff from the US Fish & Wildlife Service (USFWS) or National Oceanic and Atmospheric Administration (NOAA) Fisheries. • Design and construction details required for permit applications that are not directly related to a critical areas determination will be provided to the LAI biologist. Such elements include, but are not limited to, a stormwater drainage report; a temporary sediment and erosion control plan; proposed construction timing, sequencing and duration; and primary types and duration of construction equipment to be used. • This task does not include efforts to conduct a 6-month update review of species listings. • The scope of work does not include monitoring of any federally listed or state listed species during construction activities. Should any monitoring of these species be required, an addendum to this scope and budget can be prepared. • This task will be limited to preparation of the APE and coordination with the WSDOT archeologist. • For this task, LAI will be provided with a detailed project description of the project, project area including areas of ground disturbance and known staging areas, and conceptual plans showing the scope of work and cross-sections. • Cost for professional archaeological investigation and/or historic property inventory are not included in this scope of services. • SEPA checklist will not be required as part of the project applications. NEPA documentation prepared in association with federal funding will be adopted as the SEPA environmental analysis pursuant to WAC 197-11-630 and Chapter 21.04.230 of the Tukwila Municipal Code (TMC). • The City will pay all the applicable permit application fees. • LAI staff attendance at a Hearing Examiner meeting is included in this scope of services. • A tree size and location survey (the results of which are required to be shown on the plans) will be completed by others and incorporated into the plans in support of City shoreline permitting. • The plan set will include the required Landscape Plan, Site Plan and Sensitive Area Plan, and will be compiled by TranTech. • Construction will begin within 2 years of permit approval and be completed within 5 years. • USCG will not require navigation study in support of bridge permitting. 89 City of Tukwila 42nd Ave S Bridge Replacement Page 19 of 41 • The 30% design plans will be suitable for the shoreline permit application, and the City will waive the requirement that civil plans be stamped, signed, and dated by a licensed professional engineer as part of the permit application. • TranTech will incorporate mitigation in landscape plans and specifications as required by the City’s Shoreline Master Plan (SMP). • Irrigation design is not included in this task. • Grading design and grading plans are not included in this task. • A Temporary Erosion and Sediment Control (TESC) Plan is not included in this scope. Some erosion control design is anticipated, but any erosion control elements are expected to be minor and be coordinated with Trantech for incorporation into the TESC plan(s) prepared by others. • Impacts to the Green River Trail associated with the project meet the requirements of a Section 4(f) de minimis impact. • A concurrence letter from the agency with jurisdiction over the Section 4(f) resource will be provided to LAI by the City. • LAI will conduct noise modeling for no more than 10 receptor locations. • Peak hour Existing Year, No Build and Build Year traffic volumes will be provided to LAI. • LAI will provide a letter for the City to distribute to noise sensitive receptor locations (i.e., residences, businesses, etc.) seeking permission to complete noise field measurements. • Efforts to collect noise measurements from building interiors or balconies is not included in this scope of services. Deliverables: • An electronic (Adobe PDF) copy of the preliminary and final NEPA CE form • An electronic (Adobe PDF) copy of the draft and final Wetland and Waterway Delineation Technical Memorandum. • An electronic (Adobe PDF) copy of the permit matrix • An electronic (MS Word) copy of the draft Screening-Level Hazardous Materials Linear Corridor Report • An electronic (Adobe PDF) copy of the final Screening-Level Hazardous Materials Linear Corridor Report. • An electronic (Adobe PDF) copy of the draft BA and EFH Evaluation report. • An electronic (Adobe PDF) of the final BA and EFH Evaluation report. • An electronic (Adobe PDF) copy of the draft APE. • An electronic (Adobe PDF) copy of the final APE. • An electronic (Adobe PDF) copy of the draft Shoreline Permit application submittal(s). 90 City of Tukwila 42nd Ave S Bridge Replacement Page 20 of 41 • An electronic (Adobe PDF) and required paper copies of the final Shoreline Permit application submittal(s). • E-mail and/or telephone correspondence providing information needed for project landscape plans for the purpose of fulfilling project mitigation requirements related to shorelines • An electronic (Adobe PDF) copy of the draft Section 4(f) De Minimis Impact Determination form • An electronic (Adobe PDF) copy of the final Section 4(f) De Minimis Impact Determination form. • An electronic (MS Word) copy of the city-review draft noise technical report. • An electronic (MS Word) copy of the WSDOT-review draft noise technical report. • An electronic (Adobe PDF) copy of the final Noise technical report. 91 City of Tukwila 42nd Ave S Bridge Replacement Page 21 of 41 WORK ELEMENT 5 BRIDGE AESTHETICS This Work Element is performed by Makers to provide Bridge Aesthetics and Landscaping design. The following outlines the tasks associated with this work: 5.1 Concept Design for Urban Design Elements a. Review engineering work, site constraints, existing City policies and activ ities relevant to the project. Assist as requested regarding street configuration and relationship to adjacent properties. Meet with City Staff and Consultant Team to discuss opportunities, constraints and ideas. (Follow-up with selected Staff and team members may be necessary b. Sketch preliminary concepts c. Review with staff (one meeting) and engineering team and refine the concepts. d. Assist Enviro-issues with public open house. (Event time only) e. Review results of the open house with the Staff/Consultant team. f. Work up preferred ideas at 30%, 60%, 90%, 100% design level for aesthetic and landscaping features. Provide drawings in a format compatible with the engineering documents. (Format provided by the engineering team.) Provide narrative description of urban design and/or outline g. Prepare 30%, 60%, 90% and 100% design level quantity estimate and opinion of cost estimate for the selected aesthetic and landscaping features. Assumptions: • City and Enviro-issues will organize the open house and publicize and arrange for the meetings and presentations. Makers will assist in conducting the sessions. • Makers will not be involved in lighting, electrical or utilities work. • The budget assumes 6 meetings or conferences with the engineering/City team and one public event (open house). • The engineering team will provide Makers with CAD layouts, templates and numbering to meet the requirements of the final bid document formatting. Deliverables: • Concept sketches for the open house • 30%, 60%, 90%, and 100% documents of urban design (Aesthetic) and Landscaping elements of the project in digital format (CAD) as provided by the engineering team. 92 City of Tukwila 42nd Ave S Bridge Replacement Page 22 of 41 WORK ELEMENT 6 UTILITY COORDINATION This Work Element is performed by TranTech to provide utility coordination and potentially design for the project. 6.1 Utility Coordination Utilities owned and operated by other agencies/entities, other than the City, that are within the project corridor of the bridge improvements will be identified. TranTech will acquire and review record drawings of existing utilities within the project limits and define potential utility conflicts. For the purpose of preparing this scope of work, it is anticipated that up to four (4) utilities are located in the project corridor. Known utilities within the project limits include Puget Sound Energy (PSE) Gas and Electric, Comcast, King County Wastewater Treatment Services and Seattle City Light (SCL). TranTech will schedule meetings with utility owners to discuss the project and define utility needs and design criteria if the utility is impacted by the proposed bridge improvements. A total of four (4) meetings are anticipated under this subtask. Meeting will be conducted by, and minutes will be prepared by TranTech. Prepare Memorandum - Prepare a short technical memorandum to outline all the findings on the utilities at and around the project site. Assumptions: • No utility design is part of this Work Element Deliverables: • Utility coordination memorandum 93 City of Tukwila 42nd Ave S Bridge Replacement Page 23 of 41 WORK ELEMENT 7 CONSTRUCTABILITY REVIEW, CONSTRUCTION SCHEDULE AND ESTIMATION: This work element is performed by Ott-Sakai Construction Consultants (OS), to provide constructability review, construction schedule, and construction estimation services. The work element includes the following activities: 7.1 Constructability Review and Cost Estimation OS will provide Constructability Review and Cost Estimation of the design team’s prepared TS&L Report and Plans, & Estimate (P&E) package at 30% design level. OS will also provide Constructability Review, Construction Schedule and Cost Estimation of the design team’s prepared Plans, Specifications & Estimate (PS&E) package at 60% and 90% design level. Deliverables: • Constructability Review and Estimation for TS&L Report. • Constructability Review and Estimation for 30% P&E design level. • Constructability Review, Construction Schedule and Cost Estimation for 60% and 90% PS&E Levels 94 City of Tukwila 42nd Ave S Bridge Replacement Page 24 of 41 WORK ELEMENT 8 - TRAFFIC CONTROL AND TRAFFIC SIGNAL: This work element is performed by Transpo Group, Inc. (Transpo) to provide traffic analysis, traffic control, detour, and traffic signal plans for the Contractor’s use in constructing the proposed bridge and roadway improvements. 8.1 Traffic Analysis Transpo will evaluate existing and future traffic conditions as described within this subsection at the following intersections: • 42nd Ave S/Interurban Ave S • 42nd Ave S/S 124th St • Interurban Ave S/S 124th St • Interurban Ave S/Access Roadway Transpo will coordinate with the City to identify appropriate evaluation criteria for comparing and analyzing potential improvement options. Future Demand It is assumed that the Puget Sound Regional Council (PSRC) travel demand model will be used to develop future year traffic projections at the study intersections identified above. The Consultant will coordinate with the Client to identify an appropriate existing year and design year for analysis. Traffic Operations and Level-of-Service Synchro (Traffic Signals) and aaSidra (Roundabouts) software will be utilized to analyze existing and future traffic operations, queue lengths, and levels-of-service at the study intersections. The purpose of this analysis will be to establish baseline and future no-build conditions for vehicle delay, level-of-service, and travel times through the intersection for vehicles, transit vehicles, and non-motorized users. Evaluate Options It is assumed that the following improvement options will be evaluated: • Option 1 – S 124th St Bridge – Traffic Signal o S 124th St is connected to Interurban Ave S with a new bridge across th e Duwamish River. o A new traffic signal is installed at the S 124th St/Interurban Ave S intersection. o The north leg at the 42nd Ave S/Interurban Ave S intersection is removed. o The existing signal at 42nd Ave S/Interurban Ave S is modified as needed and the Interurban Ave S/Access Roadway intersection is signalized, if warrants are met. • Option 2 – S 124th St Bridge – Roundabout 95 City of Tukwila 42nd Ave S Bridge Replacement Page 25 of 41 o S 124th St is connected to Interurban Ave S with a new bridge across the Duwamish River. o A new roundabout is installed at the S 124th St/Interurban Ave S intersection. o The north leg at the 42nd Ave S/Interurban Ave S intersection is removed. o The existing signal at 42nd Ave S/Interurban Ave S is modified as needed and the Interurban Ave S/Access Roadway intersection is signalized, if warrants are met. • Option 3 – 42nd Ave S Bridge – Existing Condition The options will be evaluated against previously established evaluation criteria to help refine and prioritize the potential improvement options for each intersection. In cooperation with the Client and project team, a scoring matrix will be developed with appropriately weighted evaluation criteria for the purpose of rating and prioritizing improvement options. Conceptual Drawings of Improvements The Consultant will develop conceptual drawings of Options 1, 2, and 3 utilizing survey data (if available) and/or readily available aerial imagery. The conceptual drawings will represent an approximately 10 percent design level. Summary Report The Consultant will prepare a final report that summarizes the results of the traffic analysis, evaluation of alternatives, and the Project Team’s recommendations. Following one round of comments from the Client, the report will be finalized. Deliverables: • Concept drawings • Summary traffic analysis report 8.2 Traffic Control The Consultant will prepare traffic control plans, special provisions, and engineer’s opinion of cost for constructing the proposed bridge and roadway improvements. Attend a total of 3 team meetings to discuss what type and duration of closures are needed for which phase of the bridge reconstruction. Attend up to 2 neighborhood meetings to present and discuss closure plans. The exact limits of the traffic control will be determined jointly between the CITY and the Consultant; however, the initial scope and fee are based on the listed assumptions below. The plans will conform with MUTCD and/or WSDOT/City procedures and standard plans. 96 City of Tukwila 42nd Ave S Bridge Replacement Page 26 of 41 Assumptions: • The traffic control design deliverables/fee is based on Option 1 from sub-task 8.1. • Traffic control plans are anticipated to include: o TCP 1: Short term plan – full closure of S 124th St/42nd Ave S intersection o TCP 2: Short term plan – full closure of S 124th St/Interurban Ave S intersection o TCP 3: Short term plan – full closure of Green River Trail plan, including detour plan o TCP 4: Short term plan – closure of southwest corner of Interurban Ave S/42nd Ave S intersection o TCP 5: Short term plan – Westbound Interurban Avenue S right turn lane closure at 42nd Avenue S o TCP 6: Short term plan – Interurban Avenue S left/center lane closure at 42nd Ave S o TCP 7: Short term plan – Westbound Interurban Avenue S right lane closure at Access Roadway o TCP 8: Short term plan – Eastbound Interurban Avenue S right lane closure at Access Roadway o TCP 9: Short term plan – Interurban Avenue S center lane closure at Access Roadway o TCP 10: Short term plan – Westbound Interurban Avenue S right lane closure at S 124th St o TCP 11: Short term plan – Eastbound Interurban Avenue S right lane closure at S 124th St o TCP 12: Short term plan – Northbound Macadam Rd S right lane/slip-lane closure at Interurban Avenue S o TCP 13: Short term plan – Northbound Macadam Rd S left lane closure at Interurban Avenue S o TCP 14: Short term plan – Westbound S 124th St right lane closure at 42nd Avenue S o TCP 15: Long term plan – temporary staging (channelization and signing) plans for bridge work zone setup on the west side of 42nd Ave S o TCP 16: Long term plan – temporary staging (channelization and signing) plans for bridge work zone setup on the east side of Interurban Ave S • It is assumed that others will prepare all civil-related plans for temporary traffic control. This includes, but is not limited to, the design of temporary curbs, sidewalks, paving, grading, utilities, drainage, structures, geotechnical design, and related work. • Standard traffic control plans will be used to the extent feasible. • Traffic analysis is not included in task 8.2. Deliverables: • Traffic Control packages for TS&L, 30% (assumed to be the same as TS&L), 60%, 90%, and 100%/bid-ready design level. 97 City of Tukwila 42nd Ave S Bridge Replacement Page 27 of 41 8.3 Traffic Signal Design The Consultant will prepare traffic signal plans, and engineer’s opinion of cost for constructing traffic signal improvements/modifications for the project. Assumptions: • The traffic signal design deliverables/fee is based on Option 1 from sub-task 8.1. • The existing traffic signal at the 42nd Ave S/Interurban Ave S intersection will continue to operate during construction and temporary signal modifications will not be required. • Temporary traffic signals will not be required during construction at the S 124th St/Interurban Ave S, 42nd Ave S/S 124th St, and/or Interurban Ave S/Access Roadway intersections. • Permanent signal improvements at the 42nd Ave S/Interurban Ave S intersection are anticipated to primarily include: o Removing the existing mast arm and traffic signals for southbound 42nd Ave S traffic o Modifying the existing phasing and traffic signals for northbound 42nd Ave S traffic to be left turn signal heads only o Removing pedestrian signal heads and pushbuttons for crossing the north leg of the intersection • Permanent signal improvements at the Interurban Ave S/Access Roadway intersection are anticipated to primarily include: o Fully signalizing the intersection to be tied into the existing traffic signal system at the 42nd Ave S/Interurban Ave S intersection • Permanent signal improvements at the S 124th St/Interurban Ave S intersection are anticipated to primarily include: o Fully signalizing the intersection • Existing traffic signal controller and service cabinets will not be impacted by the project and will remain in operation as-is • Special signal pole foundation design is not anticipated • Transformer and/or electrical service connection design is not anticipated • It is assumed that others will prepare all civil-related plans for temporary traffic control. This includes, but is not limited to, the design of curbs, sidewalks, paving, grading, utilities, drainage, structures, geotechnical design, and related work Deliverables: • Traffic Signal packages for TS&L, 30% (assumed to be the same as TS&L), 60%, 90 %, and 100%/bid-ready design levels. 98 City of Tukwila 42nd Ave S Bridge Replacement Page 28 of 41 WORK ELEMENT 9 ILLUMINATION, AND SIGNAGE: This work element is performed by TranTech, to provide illumination, and permanent signage design services. TranTech team will prepare for illumination and signing preliminary design for 30% P&E design level. Based on the City’s selected Alternative, TranTech will provide design services associated with illumination, and permanent signing design. The illumination design is intended for the Bridge and its immediate approaches. TranTech team will prepare PS&E for this work element which includes the following tasks: 9.1 Illumination The design team will discuss guidelines and criteria with the City. The team will develop a design basis report outlining the lighting design approach, AGi32 software, design criteria, target luminance and luminance levels, power densities, wiring schematics, sources (discuss with the PUD service types and locations), color temperature and control intent. Following the input from the City, the lighting engineer will develop illumination PS&E, lighting schedules and provide required fixture catalog cuts. 9.2 Permanent Signing The design team will prepare final permanent signing sheets to reflect the final signing conditions when the project is completed. This effort will include an inventory of existing signs, upgrading sign messages as necessary, preparation of signing plans, sign specification sheets, and sign details for non-standard signs. The final signing plans will include signs for motorists, bicycles, and pedestrians. Signing will be based on the current MUTCD, and the WSDOT Sign Fabrication Manual. Assumptions: • The bridge will have full illumination for bicycles, pedestrians and vehicles. • The approaches will have full illumination and transition to existing conditions as required. • The signing will include wayfinding signs to the community center. Deliverables: • Illumination P&E at 30% design levels. • Illumination and Permanent Signing PS&E at 60%, 90%, 100% and Bid-ready design levels. 99 City of Tukwila 42nd Ave S Bridge Replacement Page 29 of 41 WORK ELEMENT 10 COMMUNITY OUTREACH: This work element is performed by EnviroIssues and TranTech to provide Community Outreach services in the TS&L Phase. Community outreach will be broken into three phases: Phase 1: Early engagement and coordination (at project initiation) During Phase 1, EnviroIssues will focus on building relationships with key stakeholders, establish local avenues for project communications and develop a plan for outreach. EnviroIssues will also develop initial project messaging and materials. Outreach will include interviews and briefings with key stakeholders and community organizations to gather initial feedback about the project, potential solutions, decision criteria and tradeoffs and outreach approach. Phase 2: Technical options and tradeoffs (with draft TS&L/pre 30% design) During Phase 2, EnviroIssues will focus outreach efforts on broader public engagement to gather feedback on the technical options, potential tradeoffs and impacts, and decision criteria to identify a preferred solution. Outreach will include stakeholder briefings, an online open house, an in-person public event and broad public notification. Phase 3: Preferred solution (pre 60% design) During Phase 3, EnviroIssues will reach back out to key stakeholders and the broader public to share details about how community input from Phase 1 and 2 was used by the City and project team to identify a preferred solution, the preferred solution and associated impacts and potential detour routes. Outreach will include stakeholder outreach and an online open house. 10.1 Community outreach plans Objectives Through collaboration with the project team, City and the surrounding community, EnviroIssues will create an overall community outreach plan and phase-specific plans that set outreach goals, methods and messaging. Activities/Approach • EnviroIssues will do initial research into the community, including previous and current engagement and a demographic analysis to help guide the outreach approach. • EnviroIssues will create a general community outreach plan that sets the overall project goals, messaging, etc. • EnviroIssues will develop outreach plans for phase 1, 2 and 3, outlining goals and strategies specific to each phase that allows us to build in flexibility as the project team learns more about community needs. 100 City of Tukwila 42nd Ave S Bridge Replacement Page 30 of 41 Task Assumptions • EnviroIssues will lead development of community outreach plans and update consistently as community needs are better understood. Task Deliverables • General community outreach plan, assumes 2 rounds of review, to be updated up to 2 times • Phase 1 community outreach plan, assumes 2 rounds of review, to be updated up to 2 times • Phase 2 community outreach plan, assumes 2 rounds of review, to be updated up to 2 times • Phase 3 community outreach plan, assumes 2 rounds of review, to be updated up to 2 times 10.2 Stakeholder interviews, briefings and phone calls Objectives In partnership with the project team, EnviroIssues will support City staff to schedule, develop questions and materials for, conduct, and document stakeholder interviews through website and webinar facilitations and/or phone briefings for Phases 1, 2, and 3. Outreach to stakeholders will include area residents, businesses, community and cultural organizations, and others. The purpose of the initial interviews and follow-up briefings will be to further understand community interests, concerns and priorities related to the bridge replacement and how the community would like to stay informed and engaged during this and future phases of the project, including pre-construction and construction phases. The interviews, briefings and phone calls provide an opportunity for key stakeholders to share their unique perspectives on the project issues and potential solutions prior to broader community outreach. The interviews, briefings and phone calls also provide an opportunity for the City to get ahead of and/or proactively address stakeholder concerns and questions prior to outreach to the broader public and share how stakeholder input has been used to inform City decisions. Activities/Approach • EnviroIssues, with the support of the project team, will identify project stakeholders and tailor an engagement approach that best suits individual stakeholder needs. • A phased approach to direct engagement will be used starting with 1) interview, 2) briefings and gather feedback, 3) briefings and correspondence to close the loop with stakeholders. • Stay Home, Stay Safe orders will be considered when determining which engagement approach to use. 101 City of Tukwila 42nd Ave S Bridge Replacement Page 31 of 41 Task Assumptions • Representatives from the City and consultant team will attend both in-person and online interviews and briefings. • EnviroIssues will facilitate scheduling interviews and briefings, either in person or via online platforms. • EnviroIssues will draft meeting minutes and additional notes. • Time billed to attending in-person activities includes up to 30 minutes of travel each way. • EnviroIssues will record feedback received during these outreach activities in Task 10.3. Task Deliverables • Assume up to 10 stakeholder interviews and summaries • Assume up to 10 briefings and summaries • Assume up to 10 emails • Assume up to 10 phone calls and associated summaries 10.3 Online engagement Objectives Online engagement will be robust as measures to address the COVID pandemic limit in-person activities. Online engagement tools will include an online open house, project website, email correspondence and an online webinar. EnviroIssues will develop an online open house website to share project information and interact with the public. An online open house tool is particularly helpful to solicit broader public input from those who are unable to attend the in-person meeting yet still have a desire to provide their input on the project. The online open house includes use of a custom sub-domain website that will be seamlessly linked from the City’s website, have a project-specific customized layout, station tabs to match in-person meeting station materials, fully responsive design (i.e. for smart phones, tablets, etc.), integration social share, and a full report of comments submitted. Activities/Approach • Develop online open house to share project information and solicit community feedback • Plan and implement an online workshop to engage with community stakeholders. • Develop up-to-date content and coordinate with City to update the project website. • Correspond and share information with public via email. Task Assumptions • EnviroIssues will coordinate with the consultant team and City to develop content and graphics for an online open house. • EnviroIssues will use the Participate. Online platform to develop the online open house. 102 City of Tukwila 42nd Ave S Bridge Replacement Page 32 of 41 • EnviroIssues will lead online open house development and online open house updates. • EnviroIssues will coordinate translation of online open house in up to 4 additional languages. The City will be responsible for directs related to translation services. • EnviroIssues will lead planning and implementation of an online webinar to coincide with the online open house. Assume 1 preparation meeting with all participating staff. • Consultant team and City staff will attend the online webinar to provide technical and expert information. • Community comments and feedback will be collected and tracked for the duration of the online open house. Task Deliverables • Participate online open house, content updated up to 1 time. • Online open house look and feel. • Presentation for online webinar, assumes 1 round of review. • Webinar plan assumes 1 round of review. • Webinar agenda and annotation agenda assumes 1 round of review. • Webinar summary assumes 1 round of review. • Spreadsheet tracking all communications, comments, and feedback collected in this Task and task 11.2. 10.4 Outreach materials Objectives EnviroIssues will develop a suite of materials and notifications to encourage stakeholders to engage with the project and share project information. Activities/Approach • EnviroIssues will develop a project look-and-feel, including branding (standards for project material color, font, etc.) and document templates, utilizing any City-established guidelines as a starting point where they are available. • EnviroIssues will develop content for the City’s project website to provide details about the project including a schedule and engagement timeline. EnviroIssues will collaborate with the City to post website content for Phase 1 and 2, and one update for Phase 3 to share the preferred solution. • EnviroIssues will develop content and graphics for project fact sheet/FAQs, to provide an overview of the project during Phase 1 and 2 outreach phases. The fact sheet/FAQ will be updated for Phase 3 outreach. EnviroIssues will also collaborate with the City to provide needed materials translation/transcreation. 103 City of Tukwila 42nd Ave S Bridge Replacement Page 33 of 41 • EnviroIssues will develop an overview presentation to be used during Phase 1 at the stakeholder interviews and an updated presentation to be used during Phase 2 for stakeholder briefings and the in-person public event. • Materials will be translated into languages identified by the project team. • Materials will present project information, including existing conditions, an outline of ways the public can provide feedback, information about design options, and project contact information. • An adaptable presentation will be developed to allow the project team flexibility when sharing project information to different stakeholders. • EnviroIssues will develop notifications for the project, including: o Content and graphics for a postcard to notify the local community about the project and upcoming Phase 2 online engagement opportunities. o Content and graphics for up to two (2) different sized display ads during Phase 2 outreach. o Content for up to three (3) email updates for the City to share with interested stakeholders. o Content and graphics for one (1) yard sign to share the online engagement site. o Content and images for up to two (2) rounds of social media content for Phase 2 and Phase 3 outreach. Task Assumptions • EnviroIssues will work with the project team and City to develop content for materials. • EnviroIssues will circulate drafts of materials with the project team and City for approval before distributing to the public. • EnviroIssues will assist the project team in developing graphics, including maps, and format materials. • The City will be responsible for covering the direct costs associated with printing and mailing materials. • EnviroIssues will coordinate translations, the City will be responsible for direct costs. • The City will coordinate the posting of social media content on City social media accounts. • EnviroIssues will assist in developing project website updates in coordination with the project team. • The City will be responsible for updating the project website. • EnviroIssues will draft project updates to be sent via City listserv. Task Deliverables • Look and Feel of outreach material in full collaboration with the City Fact sheet, assumes 1 round of review, up to 2 updates 104 City of Tukwila 42nd Ave S Bridge Replacement Page 34 of 41 • FAQ, assumes 1 round of review, up to 2 updates • Tailorable presentation for interviews and briefings, assumes 2 rounds of review • Mailed postcards, assumes 1 round of review • Up to 2 display ads, assumes 1 round of review • Yard signs, assumes 1 round of review • Social media content, assumes 1 round of review, up to 2 updates • City-provided translated versions of final materials listed above • Draft up to 5 project website updates, assumes 1 round of review • Draft up to 4 email listserv updates, assumes 1 round of review 10.5 Outreach summaries Objectives EnviroIssues will summarize feedback heard through the three phases of community engagement activities including online engagement, interviews, briefings and phone calls, to communicate the engagement process and how community feedback was incorporated into the final design. Activities/Approach • Outline community engagement activities and objectives. • Summarize feedback. • Show how feedback was used. • Reflect on success and lessons learned of engagement activities. Task Assumptions • The summaries will be shared with the public and partner agencies. Task Deliverables • Phase 1 community outreach summary, assumes 1 round of review • Phase 2 community outreach summary, assumes 1 round of review • Phase 3 community outreach summary, assumes 1 round of review 105 City of Tukwila 42nd Ave S Bridge Replacement Page 35 of 41 Work Element 11 Type, Size, Location (TS&L) Report: Based on the City’s input and based on the results from the engineering activities associated with work elements 1 through 11 , TranTech will provide structural, civil, roadway, and drainage engineering services with the goal of preparing a TS&L Report that satisfies current WSDOT BDM Section 2.1.5 requirements and will study up to four bridge replacement alternatives. Two alignment alternatives will be studied; one alternative will look at replacing the bridge in its existing location and one alternative will look at replacing the bridge back to its historical location between Interurban Ave S and S 124th St. Evaluation criteria for comparing different alternatives will be developed and scoping level engineering designs and cost estimates for each alternative will be provided. All activities associated with this task will be closely coordinated with the City and the design team will work as an extension of the City staff for recommending a preferred bridge replacement alternative. The following describes the design subtasks associated with this work element: 11.1 – Civil/ Roadway Design a. Alignment and Right-of-Way Plans Consultant will prepare the preliminary alignment and ROW plan to include proposed right-of-way acquisitions, proposed preliminary permanent easements layout, and proposed preliminary temporary construction easements (TCEs) layout, for each studied alternative. b. Site Preparation and Demolition Plans A preliminary Site Preparation and Demolition plan will be prepared for each of the studied alternatives. These plans will show topography, existing utilities, existing surface features and items for demolition, removal, or salvage. c. Roadway Plans & Profiles A preliminary Plan and Profile plan will be prepared for each of the studied alternatives in accordance with City and AASHTO design standards as appropriate for the projected 20- year ADT level of traffic. The City shall provide all current and historical traffic count data available to assist in determining an approximate 20-year ADT projection. It is assumed a formal traffic count will be conducted as part of this scope of work for 42nd Ave, 124th Street and Interurban Ave. For the alignment option at S 124th Street traffic modeling will be completed by the Transpo Group as described in work element 8. The modeling will be utilized to determine if a roundabout (single lane or two lane) or a signal is the best intersection option for the S 124th Street and Interurban Avenue S location. The modeling, coordination with the City and King County (for trail connectivity) and estimates for each option will be utilized for arriving at the recommended S 124th Street and Interurban Avenue S intersection option. Feasible connection options to the Green River Trail will be included. For the TS&L phase it is assumed the intersection at 42nd Ave S and S 124th Street will be a stop controlled intersection similar to other intersections along 124th Street, such as 43rd to 49th Ave S. and this will not be modeled or designed for during the TS&L portion of the project. If the 124th Street location is selected, the intersection of 124th Street and 42nd Ave intersection will be designed in a future phase. 106 City of Tukwila 42nd Ave S Bridge Replacement Page 36 of 41 d. Coordination with Districts, Utilities, and Stakeholders Construction of this project will affect multiple parties. Coordination will occur as part of Work Element 11. Additional coordination with outside utilities will occur as part of Work Element 6. Coordination with City utilities will occur with this Work Element. This element will include implementing results of Work Element 11 into the TS&L. e. Conceptual stormwater management plan Construction of a new bridge and approaches will require pavement replacement. A conceptual stormwater management approach will be developed for each project alternative to identify whether stormwater runoff treatment and/or stormwater flow control thresholds will be exceeded. For each alternative the Low Impact Development Performance Standard will be evaluated and possible scenarios for meeting this requirement will be explored. 11.2 TS&L Report Consultant will prepare horizontal and vertical alignment alternatives for the project to support the analysis of up to four bridge alignment alternatives. The horizontal alignment for the project has been determined by the existing roadway alignment. However, the exact alignment remains to be fixed based on detailed survey information. An opinion of cost will be prepared based on the alternatives. The opinion of cost will be based on unit prices and incorporate about a 30% contingency to account for the level of completeness of plan preparation, and to reflect experience on similar projects within the region. An evaluation matrix will be developed for purpose of comparing the costs, construction feasibility, staged construction flexibility, and other criteria as may be developed during the work. Selection of the preferred alternative will be made by the City stakeholders, and the preferred alternative will be carried forward in the design as described in work element 12. Deliverables: • Up to four alternative roadway/bridge plans and profiles • Opinion of Cost for each alternative • Evaluation matrix Design Criteria for Civil, Roadway, Stormwater, and Traffic Control Elements: Reports, plans, and estimates, to the extent feasible, shall be developed in accordance with the latest edition and amendments of the following: • City Standards and Specifications. • AASHTO 2011, “A Policy of Geometric Design of Highways and Streets; 6th Edition”; • AASHTO 2004, “A Guide for Achieving Flexibility in Highway Design of Highways; 1st Edition”; • Washington State Department of Transportation, “Standard Specifications for Road and Bridge Construction”; • Washington State Department of Transportation, “Design Manual”; 107 City of Tukwila 42nd Ave S Bridge Replacement Page 37 of 41 • Washington State Department of Transportation, “Standard Plans” • Washington State Department of Transportation, “Materials Laboratory Outline”; • Washington State Department of Transportation, “Construction Manual”; • Washington State Department of Transportation, “Local Agency Guidelines”; • Highway Research Board’s Manual entitled “Highway Capacity”; • FHWA and USDOT, “Manual on Uniform Traffic Control Devices for Streets and Highways”; • WSDOT Highway Runoff Manual; • WSDOT Hydraulics Manual; • King County – 2016 Edition of the King County Surface Water Design Manual 11.3 Structural Design Based on input from the City and engineering activities associated with work elements 1 through 11 , TranTech’s structural team will perform preliminary structural design associated with up to four viable bridge replacement alternatives for each of the aforementioned alignments (i.e., existing and S124th). The design will follow most current WSDOT Bridge Design Manual (BDM), AASHTO, and City requirements. Throughout the structural design activities, special care will be given to incorporate low impact design approaches like noise reduction, minimization of traffic impacts, Life Cost Analysis based on City-desired parameters, and environmental protection. Our bridge design activities start with a review of the gathered data provided by team members including survey, geotechnical, hydrology, traffic, civil, etc. Throughout our preliminary structural assessment/design of the studied alternatives, we will be in continuous communication with the City for consultations on parameters like structure location, length and vertical clearance. Also, required roadway elevations would be addressed. Our approach will be to work together with the City and our design team to address all engineering aspects of this bridge replacement project to optimally assess up to four viable bridge replacement alternatives for each of the aforementioned alignments. The team will recommend one alternative for a preferred alignment that possesses most of the City-desired attributes to advance to full design stage. All engineering work will be done per AASHTO LRFD Bridge Design Specifications - sixth Edition, WSDOT Standard Specifications 2020 M41-10, WSDOT Bridge Design Manual M 23- 50, June 2019 and current City Standards. All data and final products will become the property of City upon project completion. All data will be provided in a mutually agreeable format. Deliverables: • Draft TS&L Report • Final TS&L Report 108 City of Tukwila 42nd Ave S Bridge Replacement Page 38 of 41 WORK ELEMENT 12 PS&E This work element is performed by TranTech to provide 30%, 60%, 90%, 100% and Bid-ready PS&E documentation in accordance with WSDOT LAG Manual. 12.1 30% Plans and Estimate (P&E) This work element item encompasses all the activities associated with the preparation of the 30% Plans and engineer’s opinion of construction cost Estimate (P&E) documents. Constructability Review and QA/QC activities are an inherent part of this element. Deliverables: • Two 11x17 (half size) copies of Plans and Opinion of Cost. • Electronically delivered plan sheets in pdf format. • Electronic copy of the estimate’s quantities opinion of construction cost. • Electronic PDF copies of the Plans and opinion of construction cost in both PDF and Excel. 12.2 60% Plans, Specifications, & Estimate (PS&E) This work element item encompasses all the activities associated with the preparation of the 60% Plans, Technical Information Report (TIR), Special provisions, and engineer’s opinion of construction cost Estimate (PS&E) documents. Full specifications will not be provided only special provisions for review will be provided at the 60% submittal. A contingency will be incorporated into the estimate to account for the level of completeness. Constructability Review and QA/QC activities are an inherent part of this element. Deliverables: • Two 11x17 (half size) copies of Plans and Opinion of Cost. • Electronically delivered plan sheets in pdf format. • Electronic copy of the estimate’s quantities opinion of construction cost. • Electronic copy of preliminary Special provisions anticipated. • Electronic copy of the preliminary TIR. 12.3 90% PS&E This task encompasses all the activities associated with the preparation of the 90% Plans, TIR, Special Provisions and engineer’s opinion of construction cost Estimate (PS&E). Constructability Review and QA/QC activities are an inherent part of this element. Deliverables: • Two 11x17 (half size) copies of Plans and Opinion of Cost. • Electronically delivered plan sheets in pdf format. • Electronic copy of the estimate’s quantities opinion of construction cost. • Electronic copy of Special provisions. • Electronic copy of the updated TIR. 109 City of Tukwila 42nd Ave S Bridge Replacement Page 39 of 41 12.3 100% PS&E This task encompasses all the activities associated with the preparation of the 100% Plans, TIR, Special Provisions and engineer’s opinion of construction cost Estimate (PS&E). Constructability Review and QA/QC activities are an inherent part of this elem ent. This task affords the City to review the draft final construction complete construction documents one last time. Deliverables: • Two 11x17 (half size) copies of Plans and Opinion of Cost. • Electronically delivered plan sheets in pdf format. • Electronic copy of the estimate’s quantities opinion of construction cost. • Electronic copy of Special provisions. • Electronic copy of the updated TIR. 12.4 Bid-ready PS&E This work element item encompasses all the activities associated with the preparation of the Bid- ready Plans, TIR, Special Provisions and engineer’s opinion of construction cost Estimate (PS&E). Constructability Review and QA/QC activities are an inherent part of this element. Deliverables: • One half size electronic copy of the Bid-ready set of Plans • One full size originally signed copy of the Bid-ready set of Plans • Electronic copy of the Specification Manual at 100% level document per LAG, WSDOT and City templates, in MS Word format. • One electronic copy of the quantities Estimate and opinion of construction cost nd a signed original of the opinion of construction costs. • AutoCAD and/ or Civil 3D complete electronic drawing files • Electronic copy of the TIR – stamped and signed. Assumptions: City to provide: • Title block and CAD standards The Following table presents the anticipated Ad-ready plan sheets for the S 42nd Ave Bridge Replacement Project: Sheet Name PS&E Assumed Number of Sheets TS&L Assumed PS&E Submittal Phase Number of Sheets 30% 60% 90% & 100% Cover Sheet 1 X X X Index Legend and Abbreviations 2 X X Civil and Structural Demo Plans 4 X X Site Prep and TESC 4 X X Roadway Plan & Profile 8 4 X X X Striping & Paving 8 X X Roadway Typical Sections and Details 3 1 X X X ROW 2 2 X X X 110 City of Tukwila 42nd Ave S Bridge Replacement Page 40 of 41 Drainage 3 1 X X Utilities 2 X X Illumination 5 X X Construction Detour Plan 6 1 X X Traffic Control 6 1 X X Roadside Restoration 2 X X Bridge Plan & Elevation 2 4 X X X Bridge Demo 4 X X General Notes 1 X X Bridge Construction Sequencing 5 X X X Temporary Shoring 2 X X X Bridge Foundation Layout 2 4 X X X Shaft Details – Pier 1 and 4 2 X X Shaft Details – Piers 2 and 3 2 X X Pier 1 Layout (Plan & Elevation) 1 X X X Pier 1 Details 2 X X Pier 2 Layout (Plan & Elevation) 1 X X X Pier 2 Details 2 X X Pier 3 Layout (Plan & Elevation) 1 X X X Pier 3 Details 2 X X Pier 4 Layout (Plan & Elevation) 1 X X X Pier 4 Details 2 X X Framing Plan 2 X X Bridge Typical Sections 2 X X X Girder Details 8 X X Diaphragms Details 4 X X Deck Reinforcing 6 X X Bearing Details 3 X X Expansion Joint Details 3 X X Bridge Drainage Details 3 X X Utility Support Details 2 X X Bridge Barrier Details 3 X X Bridge Railing Details 2 X X Throw Fence Details 3 X X X Bridge Approach Slabs 2 X X Retaining Wall Layouts 4 X X X Retaining Wall Details 2 X X Bar Bending Sheets 4 X Guardrail 3 X X Perm. Signage and Attachments 2 X X 111 City of Tukwila 42nd Ave S Bridge Replacement Page 41 of 41 WORK ELEMENT 13 - PHASE 2 SUPPLEMENT - CONSTRUCTION PHASE SERVICES: At the discretion of the City construction phase services may be added as a supplement to this contract. The following presents the envisioned tasks associated with this work element. 14.1 Engineering Support During Construction In this task TranTech’s team will provide on-call engineering support services to the City during the construction period of the Project. This task encompasses review of and responses to Contractor RFIs; Submittals during the construction phase and preparation of As-built drawings and inventory load rating of the new bridge. Deliverables: • As-built drawings • Load Rating Analysis and Summary 14.2 Optional Construction Management Services TranTech’s team possess a highly experienced and qualified CM team. In case the City desires, TranTech staff can augment City’s team to provide CM services for this project. The following are the categorized activities associated with this Task: Pre-con Meeting; Providing Full-time Construction Project Manager for all aspects of construction activity including oversight of contractors and subcontractors, quality control, safety compliance, managing project changes, budget, and schedule. Provide continuous project management throughout the construction duration. This includes management of staff, subconsultants, and preparation for monthly invoices and progress reports; provide full-time senior inspectors (except when City Inspector is on team) to track quantities, daily inspection reports, etc.; Provide Full- time/part-time assistant inspector, as workload requires.; Review and respond to unanticipated conditions that occur during construction; Review requests to change or modify the work shown in the plans and specifications. Also provide recommendations to resolve the issue; prepare as- built drawings; and material testing Deliverables: • Progress Reports; Inspection Daily Reports; Submittal Reviews; RFI Reviews; Monthly Pay Estimates; Change Management; Record of Materials; Pre-con and Construction Photos; Testing and Lab Reports where necessary; Red-line As-built; Close-out 112 Exhibit D - Prime Consultant Cost Computations SummaryCity of Tukwila - 42nd Ave S Bridge Replacement TRANTECH TEAM BUDGET BREAKDOWNTranTech 1,493,566$ 1 Alliance89,614$ Landau- Geotechnical104,902$ Landau- Environmental100,594$ Makers71,536$ Ott-Sakai70,380$ Transpo124,464$ EnviroIssues63,569$ TOTAL PROJECT BUDGET2,118,626$ MANAGEMENT RESERVE211,863$ TOTAL CONTRACT BUDGET2,330,488$ 113 2020 STATE LEGISLATIVE AGENDA City of Tukwila, Washington Advancing Equity ▶ Develop and implement a racial equity toolkit for legislation, policies and programs to advance racial equity in Washington. Education ▶ Implement needs-based funding for allocation of social/ emotional student support resources, and expand funding for learning opportunities for summer school students. ▶ Increase funding for homeless students and secondary ELL students. ▶ Incorporate early learning for low-income students as a part of Basic Education. Revenue Reform ▶ Allow cities the authority and flexibility to address the fact that growth in the cost of providing services continues to outstrip revenues. ▶ The State should amend the law that limits annual property tax growth to 1%, and work with cities to authorize additional funding flexibility and opportunities at the local level. Preparing for our Future ▶ Enact policies to prepare to combat climate change, including adequately budgeting for its effects, and providing tools for cities to prepare and address the ramifications of flooding, pollution and other key factors. ▶ Continue to invest in workforce education and job training to ensure Washingtonians have access to high- quality career and technical education opportunities. ▶ Develop sufficient consumer privacy legislation to ensure that residents have access to their own personal data, and enact certain restrictions to technology that allow Washingtonians a right to privacy. Transportation & Infrastructure ▶ Provide funding for critical local infrastructure, including the Allentown Bridge, which is structurally deficient and functionally obsolete. ▶ Create stable, reliable infrastructure assistance funding for cities to assist in repairing roads, bridges and other public infrastructure that support economic development. Housing & Human Services ▶ Create new and expand existing local options to generate revenue for housing and human services, and for capital construction of affordable housing. ▶ We strongly encourage the State to adequately fund human services programs for the health of the safety net. Shared Revenue ▶ The State must continue its role as a partner with cities, including reinstating funding for the Public Works Assistance Account and Community Economic Revitalization Board. ▶ Ensure funding for Streamlined Sales Tax Mitigation payments brought back in the 2019 session; remain funded and identify a longer-term funding strategy beyond the 2020/2021 biennium. ▶ In addition, the State must retain the local share of liquor taxes to allow jurisdictions to address impacts – such as public safety – of privatized liquor in our cities. ▶ Continued support for the Department of Revenue’s Business Licensing System that has coordinated business licenses at the local and State levels. Preserve Lodging Tax Flexibility ▶ Ensure the definition of “tourist” in Washington State remains flexible to allow jurisdictions and Lodging Tax Advisory Committees to distribute lodging tax dollars in a manner that best serves each individual community. 114