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Home My WebLink AboutReg 2018-09-17 Item 3G - Contract Amendment #2 - Riverton Creek Flap Gate Removal with Otak Inc for $37,064 COUNCIL AGENDA SYNOPSIS ILA*N, 7---0 , "IS (---- MeetzngDate Initials ITEM Na. Prepared by Mayor review Council review , 09/17/18 HH hili (-/ --- V\ 3. G . 2 905 ITEM INFORMATION STAFF SPONSOR: HENRY HASH ORIGINAL AGENDA DA fl 09/17/18 AGENDA I ITM TI ILE Surface Water Fund - Riverton Creek Flapgate Removal Project Design and Permitting Amendment No. 2 with Otak, Inc. C.\IEGORY 0 Discussion 14,1 Motion E] Resolution E] Ordinance El Bid Award El Public ilearzng 0 Other Mtg Date Mtg Date 09/17/18 Mtg.Date Mtg Date Mtg Date Mig Date Mtg Date SPONSOR [] Council E]Mayor EI HR 0 DCD El Finance [] Fire Li IT El PeR El Police E PW SPONSOR'S This Amendment No. 2 to Otak's Contract #17-070 is to incorporate current SUMMARY recommendations for the Riverton Creek Flapgate Removal Project into final design and bid documents that will include the realigned creek channel, improved sheet pile wall design, improved construction sequencing, and services to support permitting. Council is being asked to approve the consultant contract Amendment No. 2 to Contract #17-070 with Otak for $37,064.00. REVIEWED BY 0 COW Mtg. Li CA&P Cmte Ei F&S Cmte Is] Transportation Cmte 0 Utilities Cmte El Arts Comm. El Parks Comm. [II] Planning Comm. DATE: 09/10/18 COMMYITEE CHAIR: THOMAS MCLEOD RECOMMENDATIONS: SPONSOR/ADMIN. Public Works Department COMMITTEE' Unanimous Approval; Forward to Consent Agenda COST IMPACT / FUND SOURCE EXPENDITURE REQU TRIM AMOUNT BUDGETED APPROPRIATION REQUIRED $37,064.00 $186,086.00 $0.00 Fund Source: 412 SURFACE WATER(PAGE 93, PROPOSED 2019 CIP) Comments: MTG. DATE RECORD OF COUNCIL ACTION 09/17/18 MTG. DATE ATTACHMENTS 09/17/18 Informational Memorandum dated 09/07/18 Page 93, Proposed 2019 CIP Otak Amendment No. 2 to Contract #17-070 Minutes from the Transportation &Infrastructure Committee meeting of 09/10/18 59 60 (47t Aw r' % I ;,! ;< ''it Allan Ekberg, Mayor 0 a Public Works Department-Henry Hash,Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committee FROM: Henry Hash, Public Works Director , ,4 - BY: Mike Perfetti, Habitat Project Manager DATE: September 7, 2018 SUBJECT: Surface Water Fund - Riverton Creek Flapgate Removal Project Project Number 99830103 Contract 17-070, Amendment No. 2 ISSUE Approve Amendment No. 2 to Contract No. 17-070 with OTAK, Inc. BACKGROUND In May 2017,the City entered into a consultant agreement with OTAK, Inc.for design and permitting services for the Riverton Creek Flapgate Removal Project. This project will increase salmonid accessibility to rearing habitat in Riverton Creek by removing two culverts and flap gates at the mouth of the creek and replacing a section of at-grade trail with a bridge over the restored open channel. DISCUSSION Under the original scope of work, Otak performed a review of the previous design work(Berger ABAM, 2009),and found that on- site geotechnical evaluation,cultural resources, and hydraulic modeling and scour analysis had not been provided,though stability concerns had been documented. OTAK's Amendment No. 1 added geotechnical services and some additional scope to revise the channel section to address long- term stability concerns. As a result, the team is recommending that a second row of tie-back anchors be installed in the existing sheet pile wall (supporting Tukwila International Blvd.), and a new,taller soldier pile wall be installed on the east side of the channel to minimize disturbance and excavation of the existing soils and parking lot.After a constructability review,the team also recommends revising the construction sequencing shown in the 2009 design in order to reduce the risk for mobilization of sediment into the Duwamish River during channel excavation. Sediment mobilization will likely be a concern to the environmental reviewing agencies. The proposed Amendment No. 2 will incorporate current findings and recommendations into final design and bid documents that will include the realigned creek channel, improved sheet pile wall design, improved construction sequencing, and services to support the City in addressing permit agency comments. FISCAL IMPACT Amendment No. 2 is for$37,064.00, bringing the total contract amount to$182,420. To fund Amendment No. 2,the project will utilize remaining 2018 CIP surface water design funds and the 2019 design budget,then be partially or wholly reimbursed through the 2017 SRFB design and construction grant of$846,965.00 (The match requirement is$149,465.). Agreement 2018/2019 Budget Original OTAK Contract+Amendment No. 1 $ 145,356.00 $ 145,356.00 OTAK Amendment No. 2 37,064.00 40,730.00 $182.420.00 $186,086.00 RECOMMENDATION Council is being asked to approve design Amendment No.2 for$37,064.00 with OTAK, Inc.for the Riverton Creek Flapgate Removal Project and consider this item on the Consent Agenda at the September 17, 2018 Regular Meeting. Attachments:Page 93,Proposed 2019—2024 CIP OTAK Supplemental Agreement#2 61 W:1PW Eng1PROJECTSIA-DR Projects\Riverton Flap Gate Removal(99830103 98-DR03)1Consultant Selection\Phase 21contract\Amendment#21Info Memo Otak PE Amend 42 20180810g1.docx 62 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2019 to 2024 PROJECT: Riverton Creek Flap Gate Removal Project No. 99830103 Remove two culverts and flap gates at Duwamish River; install pipe arch, create open channel DESCRIPTION: confluence, install trail bridge over new channel, restore/revegetate 200 feet of creek channel and 450 ft. of pond shoreline. JUSTIFICATION: Increase available salmonid rearing habitat and increase flood refuge in lower Duwamish River. Improve fish access to Riverton Creek and enhance salmon rearing and resting area. STATUS: Design underway in 2018. Construction grant of$846k from WA State RCO. MAINT. IMPACT: Expected to increase maintenance. COMMENT: Project used as mitigation for East Marginal Way Pipe Replacement Project and HPA Control#133763-1 requires work to be completed by June 11, 2019,which will need to be extended. FINANCIAL Through Estimated (in$000's) 2017 2018 2019 2020 2021 2022 2023 • 2024 BEYOND TOTAL EXPENSES Design 204 100 40 344 Land (R/W) 0 Monitoring 15 15 15 15 15 15 90 Const. Mgmt. 184 184 Construction 918 918 TOTAL EXPENSES 204 100 1,142 15 15 15 15 15 15 1,536 FUND SOURCES Awarded Grant 72 847 919 Proposed Grant 0 Mitigation Actual 0 Mitigation Expected 0 Utility Revenue 132 100 295 15 15 15 15 15 15 617 TOTAL SOURCES 204 100 1,142 15 15 15 15 15 15 1,536 Project Location .\ ,ffi10p' 1��,�y s e N �°m®, a_ W*Ai F I' fill- s 1111, 1 r,,i .,, 1,111.11 ‘,,,.: AI 1 . , \. .. 1111 II 410‘111 .' 4..,, , 11111 alrl 111 L it. l'1111111"e" _,,,,- -" \t` r - iiL°oA S30 "v1G/ �� V o 2019-2024 Capital Improvement Program 93 63 64 Exhibit A-2 Scope of Work Riverton Creek Flapgate Removal Project City of Tukwila August 7, 20I8 Otak Project No. 32740 Amendment No. 2 A 75-percent design for the Riverton Creek Flapgate Removal Project was completed previously by a different consultant. Under the original Scope of Work, Otak performed an Intake Review of the previous design and found that on-site geotechnical evaluation, cultural resources, and hydraulic modeling and scour analysis had not been provided with the previous design, even though stability concerns had been documented. Further, based on a site investigation of existing conditions,Otak's team recommended that the proposed channel section be revised to address slope stability and erosion concerns. The previous Amendment No. 1 added geotechnical services and some additional scope to revise the channel section to address long-term stability concerns. Once on-site geotechnical explorations and analysis were performed, the team met to review the geotechnical recommendations and identify necessary measures to address global stability, since, the adjacent Tukwila International Blvd.bridge abutment sheet pile wall and private parking lot will be supported by the proposed channel side slopes after flapgate and culvert removal and breaching of the revetment. Options considered included further stabilization measures for the existing sheet pile wall such as a new sheet pile wall at the base of the existing wall or the installation of a lower row of tie-back anchors nearer the base of existing wall. Options for a new retaining wall along the east side of the channel were also considered to maintain the existing private parking lot. Constructability and cost were compared between optional design elements for stabilization. In addition to the channel alignment and pedestrian bridge being shifted east, further away from the existing sheet pile wall, the team recommends that a second row of tie-back anchors be installed in the existing sheet pile wall, and a new, taller soldier pile wall be installed on the east side of the channel to minimize disturbance and excavation of the existing soils and parking lot. After constructability review, the team also recommends revising the construction sequencing shown in the 75% design by others in order to reduce the risk for mobilization of sediment into the Duwamish River during channel excavation. Sediment mobilization will likely be a concern to the environment review agencies. The recommended revisions to the previous design and the addition of new stabilization elements are beyond the final design scope. At the request of the City, Otak also met with WSDOT in the field to review the project and a general permit will be required from the WSDOT Local Agency and Development Services group. They have requested to review all 65 Exhibit A-1 Scope of Work Continued technical analysis including the geotechnical report,hydraulic analysis, and structural calculations. Coordination with WSDOT and permitting support services to address comments are beyond the permitting support scope. The following scope is for additional final design services for the recommended stabilization measures based on the geotechnical analysis and additional services to support the City in addressing comments from permitting agencies. This scope also provides additional services for preparation of final bid documents which was removed in Amendment No. 1. The following table provides a summary of the contract value for the project as modified by Amendment No. 2. Contract Authorized Fee Original Contract $105,363.00 Amendment No. 1 $39,993.00 Amendment No. 2 $37,064.00 Total $182,420.00 Scope and Budget Modifications 1. I Project Management and Coordination The scope for this task is increased to provide project management and coordination for an extended project schedule for anticipated construction in 2019. This includes additional services for regular status update meetings with the City, project management, and preparation of project reports and invoices. 4.1 JARPA Preparation The scope for this task was reduced with Amendment No.1. The scope for this task is increased to provide services for development of grading quantities to be included in the Joint Aquatic Resources Permit Application (JARPA) being prepared by the City. The quantities will include the revised construction sequencing of the culvert removal and revetment grading. Otak will also provide the project summary narrative via email for the JARPA. 4.7 Permitting Support The scope for this task was reduced with Amendment No. 1. This scope provides services for developing responses to comments received during review of permit submittals. The scope for this 66 W:\PW Eng\OTHER\Mike Perfetti\temp\Riverton Creek Flapgate\Riverton SOW_Amend 2_18_0807.docx 2 Exhibit A-1 Scope of Work Continued task is increased to include one round of comment response for the JARPA and one round of comment response for the WSDOT General Permit. Task 5 — Final Design 5.1 Final Design and Plan Sheets 4 Creek Grading, Trail Restoration, and Bank Armoring Design The scope for this task is increased to include final design of the following elements: 1. Revised channel alignment and section to allow 2:1 channel side slopes. 2. Revised bridge location and existing concrete wall demo and tie-in extents to align with revised channel location. 3. Additional row of tie-back anchors in the lower portion of the existing sheet pile wall. 4. Revised construction sequencing shown in the plans to reduce the potential for in-water work and to minimize sediment mobilization during culvert removal and channel grading activities. 6 Retaining Wall Design (3 sheets) This scope is increased to include final design of a solider pile wall east of the proposed channel with greater vertical and horizontal extents. 5.2 Specifications Otak will provide final bid-ready General Special Provisions (GSP) and project-specific Special Provisions for Divisions 2—9, excluding the landscape and planting Special Provisions to be prepared by the City per Amendment No. 1 scope. Per Amendment No. 1 scope,The City will prepare Division 1 of the Specifications and compile the master Contract Manual including all Contract and Bid Forms,Amendments to the WSDOT Standard Specifications, and Appendices. The City will incorporate Special Provisions provided by Otak. 5.3 Construction Cost Estimates Otak will prepare a final Engineer's Estimate for construction. W:\PW Eng\OTHER\Mike Perfetti\temp\Riverton Creek Flapgate\Riverton SOW Amend 2_18_0807.docx 3 67 Exhibit A-1 Scope of Work Continued Deliverables: 1. Final bid-ready Special Provisions Division 2-9 in MS Word format 2. Final full-size signed Bid Plans 3. Final Engineer's Estimate 4. Comment Responses to permitting agencies provided via email 68 W:\PW Eng\OTFIER\Mike Perfetti\temp\Riverton Creek Flapgate\Riverton SOW_Amend 2_18_0807.docx 4 Exhibit 13-2-Fee Estimate City of Tukwila-Riverton Creek Flapgate Removal Project Otak,Inc.,Project 32740 AMENDMENT NO.2,8/7/18 Proj.Mgmt./Design Stmcrurel Environment) Resource CADD Admen iGeorech Cultural H a. E:F T. a c _ — o Task Description ,, ,., cJ `,� j U r, r, „ _-0 _ . F° 1° O 0 C7 e'. U ! Task 1 !Project Management 2 16 18 $ 2,628 $ 2,628 T _.. I 1.1 Project Management and Coordination 2 16 j 18 52,628 • Task 4 1Permitting,Environmental Review and Coordination 14 4 2 4 4 2 8 1 38 $ 4,936 $ 4,936 1 4.l IJARPA Preparation 8 2 4 2 8 1 24 $2,839 1 4.7 Permitting Support 6 4 4I 14 $2,097 i 1 ! Task 5 !Final Design 52 44 78 _—�— 54 32 8 268 5 29,500 $ 29,500 5.1 Final Design and Plan Sheen 4.Creek Grading,Tmil Restoration,and Bank Armoring Design 41) 30 61)) 40 21 194 $21,545 Final PSE Bid Set ! 6 8 16 aI _ 8 44 $4,738 5.2 Specifications Penal PSE Bid Set 4 ! 4 4 8 20 52,052 5.3 Construction Cost Estimates li Final PSE Bid Set 2 2 2 4 10 $1,165 Project Total Hours 2 82 4 46 82 4 2 , 62 1 32 8 324 Billing Rate(including OH and Profit) $234.60 S13490 $189.16 $131.97 $104_11) S132.67 5117.30 $105.59 1 S71.67 _ $70.15 !Toni Labor Cost,including Overhead and Profit S 470 $ 11,062 $ 757 $ 6,071 S 8,536 S 531 $ 235 S 6,547 S 2,294 $ 562 S 37,064 II S - S - $ 37,064 'IDircct Espcnses I, ,. $ - 'I. $ Project Total(Amendment No.2) i I 15 37,064 $ - !5 - 15 - $ 37,064 W a:\PW Eng\PROJECTS\A-DR Projects\Riverton Flap Gate Removal(99830103 98-DR03)\Consultant Selection 2\contract\mendment#2\Riverton Fee Est_Amend 2_18_0807 (3) CO 70 Transportation&Infrastructure Committee Minutes September 10,2018 C. Grant Acceptance: Stormwater Quality Retrofit Project Staff is seeking Council approval of a grant agreement with the Washington State Department of Ecology (DOE) in the amount of $287,500.00 for the Stormwater Quality Retrofit Project. This project will select seven candidate sites for water quality retrofits and advance up to four projects to 90%design.The 15%required City match will come from Surface Water funds with $115,000 currently budgeted in 2019. Councilmember Quinn reiterated his request to expand the memo to better define the Surface Water fund. UNANIMOUS APPROVAL. FORWARD TO SEPTEMBER 17, 2018 REGULAR CONSENT AGENDA. D. Contract Amendment: Riverton Creek Flapgate Removal Project Staff is seeking Council approval of Amendment 2 to Contract 17-070 in the amount of * $37,064.00 with OTAK, Inc. for the Riverton Creek Flapgate Removal Project. The project will remove two culverts and flap gates and replace a section of at-grade trail with a bridge over the restored open channel. The proposed amendment will incorporate current recommendations into final design and bid documents and will bring the total contract amount to $182,420. The amendment will be funded through remaining 2018 surface water design funds and the 2019 design budget,then be partially or wholly reimbursed through the 2017 Salmon Recovery Funding Board design and construction grant. Councilmember Idan asked if any projects would go funded as a result, and staff replied there is adequate budget for other planned projects. UNANIMOUS APPROVAL. FORWARD TO SEPTEMBER 17, 2018 REGULAR CONSENT AGENDA. E. Project Completion: 2017 Sm ll Drainage Program Staff is seeking Council approval of project completion and release of retainage to McCann Construction, Inc.in the amount of$448,471,71 for the 2017 Annual Small Drainage Program. Drainage improvements were installed at three locations: 48"Avenue South between South 160' Street and South 162nd Street, Strander Boulevard sidewalk in front of Target, and 58' Avenue South,14423 to 1,4455.The project was physically completed on January 16,2018 and concluded under budget. UNANIMOUS APPROVAL. FORWARD TO SEPTEMBER 17, 2018 REGULAR CONSENT AGENDA F. Supplemental Agreement: 2018 Annual Small Drainage Program Staff is seeking Council approval of Supplement No. 1 to Contract No. 18-063 with KPG, Inc. in the amount of$57,480,00 for construction management services for the 2018 Small Drainage Program. This is an extension of the design engineering services contract already executed with KPG. To save,money, staff will be doing more of the inspection work rather than contracting it out. UNANIMOUS APPROVAL. FORWARD TO SEPTEMBER 17, 2018 REGULAR CONSENT AGENDA. 71