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HomeMy WebLinkAboutUtilities 2016-09-27 COMPLETE AGENDA PACKETCity of Tukwila Utilities Committee ❖ Kathy Hougardy, Chair ❖ Kate Kruller ❖ Thomas McLeod AGENDA Distribution: G. Labanara K. Hougardy p. Brodin K. Kruller R. Turpin T. McLeod Deputy City Clerk J.Duffie Clerk File Copy D. Robertson 2 Extra Mayor Ekberg Consent Agenda D. Cline e-mail cover to: A. Le, L. Humphrey C. O'Flaherty, K. Hougardy, B. Giberson D. Almberg, B. Saxton, R. Tischmak S. Norris, L. Humphrey TUESDAY, SEPTEMBER 27, 2016 — 5:30 PM FOSTER CONFERENCE ROOM - 6300 Building Item Recommended Action Page 1. PRESENTATION(S) 2. BUSINESS AGENDA a) Crystal Springs Emergency Surface Water Repair a) Forward to 10/1/16 Regular Pg. 1 Supplemental Agreement No. 1 for CM Services Consent Agenda b) NPDES — Review Surface Water Management LID b) Information Only Pg. 11 Code Amendments, TMC Title 16 3. ANNOUNCEMENTS 4. MISCELLANEOUS Future Agendas: Next Scheduled Meeting: Tuesday, October 11, 2016 SThe City of Tukwila strives to accommodate individuals with disabilities. Please contact the Public Works Department at 206 - 433 -0179 for assistance. City of Tukwila Allan Ekberg, Mayor TO: Utilities Committee FROM: Bob Gibensom~ Public Works Director f,0 BY: Ryan Larson, Senior Program Manager CC: Mayor Ekberg DATE: September 23, 2016 SUBJECT: Crystal Springs Emergency Surface Water Repair Project No. 91641206. Contract No. 18-104 Supplemental Agreement No. 1 for Construction Management Services ISSUE Approve Supplemental Agreement No. 1 with KPG, Inc. /KPG\to provide construction management services for the Crystal Springs Emergency Surface Water Repair project. BACKGROUND Three engineering firms were evaluated to provide construction management services for the Crystal Springs Emergency Repair Project (see attached scoring and selection 0O81hx). Each Of the consulting firms evaluated were well qualified with expertise in construction management; hOVVeV8['KPG possesses the best overall knowledge and understanding Of the City's construction requirements and the project d8GigD.KPGh8Spn]VideddDSigO8DdCOnSt[UCtiOD management services for numerous City projects 8Gvve||8Gp[8p8[8dih8d8SigOfOrthiGp j8Ct DISCUSSION KPG provided and staff has reviewed 8 contract supplement, scope Of work, and fee estimate for construction management services for the Crystal Springs Emergency Surface Water Repair for $30.S05.11. Council awarded the construction contract i0 Hoffman Construction UD September 1S'2O18. FISCAL IMPACT Funding is proposed from the 2018 Annual Small Drainage Program, 8S only one bid that was over budget was received and rejected by Council by Resolution 1886. COOSiOJCtiOn Management Sup N0. 1 RECOMMENDATION Council is being asked tVapprove Supplemental Agreement No. 1tO Contract No. 1O-1O4for construction management services with KPG, Inc. for the Crystal Springs Emergency Surface Water Repair iO the amount Of$8S,9U5.11 and consider this item OD the Consent Agenda 81the October 3,2O1O Regular Meeting. Attachments: Consultant Selection Scoring Matrix CIP Page 82,2015 C|P KPG Supplement No. 1, Scope of Work and Fee Estimate WAPW Eng\PROJECTS\A- DR Projects\Crystalnprings Emergency Surface Water Repair (91641206)\CM Selection\lnfo Memo CM KPG Sup m092316.docx Crystal Springs — Construction Management Services Selection Harris and Associate! Parametrix KPG, Inc. Draiange and Paving project design / constuction experience. 1 2 3 Current Knowledge of State and Tukwila Standards and Procedures. 2 2 3 Experience with HPA and Environmental Issues 2 3 3 Experience with similar local agency projects 3 3 3 Past Experience Managing City Projects 2 2 3 Small Scale Projects. 2 2 3 Utilities Coordination. 3 3 3 Contruction Inspection. 3 3 3 TOTALS 18 20 24 For each category, highest score is 3 (with the lowest or worst score 1) -Firms simply ranked against each other. Consultant with the highest score is ranked the best. Staff: Ryan Larson Selection Date:9 /7/16 Selected Consultant: KPG, Inc. Selection Justification: This firm has demonstrated relevant construction and design project experience including exceptional familiarity with WSDOT and City standardst and has performed well on previous city drainage and overlay projects in providing design and CM services. Based on overall score KPG prevailed. N CRY OFTUKVVLA CAPITAL PROJECT SUMMARY 2015 to 2020 PROJECT: Annual Snna|| Drainage Program Project No. Varies DESCRIPTION: Select, design, and construct small drainage projects throughout the City. Provide drainage JU8�|F|�A�|ON' ' ' replacements, drain extensions, and pavement upgrades. STATUS: Projects for this annual program are taken from Small Drainage Project List. K8A|NT.|(NPACT: Reduces maintenance. Ongoing project, only one year shown in first column. Construction expenses may occur over two calendar COMMENT: years. Budget for 2014 includes $270k for Thorndyke Safe Routes to School (S 150th St). Grants from State Municipal Stonnwmhor Capacity Grants. FINANCIAL Through Estimated (in $000's) 2013 2014 2015 2016 2017 2018 2019 0000 BEvomo TOTAL EXPENSES Design 60 80 80 80 80 80 80 80 620 Const. Mgmt. 70 80 80 80 80 80 80 80 630 Construction 279 270 325 525 525 525 525 525 525 4,024 FUND SOURCES Awarded Grant 50 50 100 Proposed Grant 0 Mitigation Actual 0 Mitigation Expected 0 Utility Revenue 409 220 485 635 685 685 685 685 685 5,174 TOTAL SOURCES 409 270 485 685 685 685 685 685 685 5,274 201n-2020 Capital Improvement Program 82 3 SUPPLEMENTAL AGREEMENT No. 1 AGREEMENT No. 16-104 PROTECT No. 916412061 City of Tukwila Public Works Department 6300 Southcenter Boulevard 9100 Tukwila, WA 98188 KPG, Inc. 753 - 9th Avenue N. Seattle, WA 98109 PROJECT: Crystal Springs Emergency Surface Water Repair— Construction Services This SUPPLEMENTAL AGREEMENT NO. 1 is to supplement the agreement entered into with KPG, Inc. and the City of Tukwila, which was executed on the 26th day of August, 2016. All provisions in the basic agreement remain in effect, except as expressly modified as follows: Article 2, Scope of Services, shall be supplemented with the following: The Consultant agrees to provide construction services in accordance with the scope of work included as ExhibitA. Article 4, Payment, shall be modified as follows: Payment for work provided by Consultant shall be made as provided on Exhibit B, attached hereto, provided that the total amount ofpayment to the Consultant for this work not exceed $39,905.11 without express written modification of the Agreement signed by the City. The new total contract shall not exceed $99,884.79 without express written modification of the Agreement signed by the City. IN WITNESS WHEREOF, the parties hereto have set their hands and seals this day of , 2016. APPROVED: CITY OF TUKWILA Allan Ekberg Mayor Attested: Christy O'Flaherty, City Clerk APPROVED: KPG, INC. Nelson Davis, P.E. Principal 4 *:1:11:311 L1 Construction Management Services Scope of Work September 19, 2016 City of Tukwila — Crystal Springs Emergency Surface Water Repairs This work will provide construction management services for the construction contract to complete the City of Tukwila — Crystal Springs Emergency Surface Water Repair Project. These services will include design support, project management, inspection, materials testing, and contract administration during the construction of the project, as detailed below. KPG ( "Consultant ") will provide to the City of Tukwila ( "City ") construction management services for the project. A detailed scope for the Contract follows: I. INTRODUCTION The following scope of services and associated costs are based upon the assumptions outlined below. General Assumptions: • The proposed project team will include one part -time documentation control specialist, a part -time project engineer, a full -time inspector, sub - consultants to provide services for materials testing and observation of sinkhole compaction, and other supporting tasks as deemed necessary. • The level of service is based on a construction project duration of approximately 25 working days. • KPG estimates a total project duration of 45 working days (9 weeks) including preconstruction service, construction services, and project closeout. No suspensions or stop work periods are anticipated during this duration. • It is anticipated that the City will review and execute the insurance, bonds, and the Construction Contract. • The design engineers from KPG will be available during construction to answer questions during construction and review RAM's, shop drawings, and answer RFI's that require a level of engineering expertise outside of the capabilities of the Consultant. • Services will be performed in accordance with the Contract plans & special provisions, and City engineering standards. Crystal Springs Emergency Repair Page 2 of 7 KPG Construction Man agemen t Services Project Number 16001A Scope of Work 9119116 61 *:1:11:311 L1 II. SCOPE OF WORK The objective and purpose of this Construction Management Services Agreement is for the Consultant to successfully deliver the construction of the Project to the City by ensuring that the improvements are constructed in accordance with the approved Plans and Specifications, as may be amended or revised, that all of the required Project documentation is accounted for. TASK 1— MANAGEMENT /COORDINATION /ADMINISTRATION Provide overall project management, coordination with the City, monthly progress reports, and invoicing. This effort will include the following elements. • Organize and layout work for project staff. Prepare project instructions on contract administration procedures to be used during construction. • Review monthly expenditures and CM team scope activities. Prepare and submit project progress letters to the City along with invoices describing CM services provided each month. Prepare and submit reporting required by funding source(s), if any. Deliverables • Monthly invoices and progress reports TASK 2 — PRECONSTRUCTION SERVICES 2.1 Preconstruction Conference: The Consultant will prepare an agenda for, distribute notices of, and conduct a preconstruction conference in the City's offices. The Consultant's project manager, project engineer, inspector, and document control specialist will attend the preconstruction conference. The Consultant will prepare a written record of the meeting and distribute copies of the minutes to all attendees and affected agencies, staff, etc. At the Pre - construction conference, the Consultant shall facilitate discussions with the Contractor concerning the plans, specifications, schedules, issues with utilities, unusual conditions, Federal, State, and local requirements and any other items that will result in better project understanding among the parties involved. Deliverables • Preconstruction conference agenda with meeting minutes TASK 3 — CONSTRUCTION SERVICES -.FIELD 3.1 On -site Observation: The Consultant shall provide the services of one full time inspector during construction activities and other tasks necessary to monitor the progress of the work. Construction staff shall oversee the following items of work, on theproject site, and will observe the technical progress of the construction, including providing day -to -day contact with the Contractor and the City. Field inspection staff will perform the following duties as a matter of their daily activities: i. Observe technical conduct of the construction, including providing day -to -day contact Crystal Springs Emergency Repair Page 3 of 7 KPG Construction Man agemen t Services Project Number 16001A Scope of Work 9119116 6 EXHIBITA with construction contractor, City, utilities, and other stakeholders, and monitor for adherence to the Contract Documents. The Consultant's personnel will act in accordance with Sections 1 -05.1 and 1 -05.2 of the Standard Specifications. ii. Observe material, workmanship, and construction areas for compliance with the Contract Documents and applicable codes, and notify construction contractor of noncompliance. Advise the City of any non - conforming work observed during site visits. iii. Document all material delivered to the job site in accordance with the contract documents. iv. Prepare daily inspection reports, recording the construction contractor's operations as actually observed by the Consultant; includes quantities of work placed that day, contractor's equipment and crews, and other pertinent information. V. Interpret Contract Documents in coordination with the City and KPG. vi. Resolve questions which may arise as to the quality and acceptability of material furnished, work performed, and rate of progress of work performed by the construction contractor. vii. Establish communications with adjacent property owners. Respond to questions from property owners and the general public. viii. Collect and calculate delivery tickets and salesman's daily reports of aggregate. All tickets will be initialed with correct bid item and stationing identified (Construction Manual 10 -2). ix. Attend and actively participate in regular on -site weekly construction meetings. X. Take periodic digital photographs during the course of construction, and record locations. xi. Prepare monthly requests for payment, review with the City, contractor and approve as permitted. Utilize City provided format for pay estimates, or Consultant format. xii. Process and track all certified payroll per State Prevailing Wage Requirements. This includes verifying the initial payroll for compliance and 10% of all payrolls submitted thereafter. Tracking payroll each week. xiii. Prepare and issue weekly statement of working day report each week. xiv. Process / Approve all required subcontractor documentation. Request to Sublets will be verified and logged. This includes checking System Award Management System (SAMS), verifying business licensing, reviewing insurance xv. Punch list. Upon substantial completion of work, coordinate with the Client to prepare a 'punch list' of items to be completed or corrected. Coordinate final inspection with those the City. A punchlist and Certificate of Substantial Completion will be prepared by the Consultant and issued by the City. 3.2 Materials Testing: Coordinate the work of the materials testing technicians and testing laboratories in the observation and testing of materials used in the construction; document and evaluate results of testing; and address deficiencies. Frequency of testing shall be determined by the inspector. A geotechnical subconsultant will be on site to monitor compaction of the sinkhole area. Assumptions: Crystal Springs Emergency Repair Page 4 of 7 KPG Construction Man agemen t Services Project Number 16001A Scope of Work 9119116 VA EXHIBITA • Consultant will provide observation services for the days /hours that the contractor's personnel are on -site. • Consultant will provide qualified personnel for inspection of all bid item work. • The Consultant's monitoring of the construction contractor's activities is to ascertain whether or not they are performing the work in accordance with the Contract Documents; in case of noncompliance, Consultant will reject non - conforming work, and pursue the other remedies in the interests of the City, as detailed in the Contract Documents. The Consultant cannot guarantee the construction contractors' performance, and it is understood that Consultant shall assume no responsibility for: proper construction means, methods, techniques; project site safety, safety precautions or programs; or for the failure of any other entity to perform its work in accordance with laws, contracts, regulations, or City's expectations. Deliverables • Daily Construction Reports with project photos — submitted on a weekly basis • Punch List, Certificate of Substantial Completion • Review test reports for compliance TASK 4 — RECORD DRAWINGS AND CLOSEOUT 4.1 Record Drawings: Review record drawings prepared by the Contractor, and prepare a conformed set of project record drawings based on Contractor provided information and from inspection notes. Record drawings to be verified on a monthly basis, as part of the progress payment to the Contractor. Upon project completion, contractor provided markups will be verified for completeness and supplemented with inspection information. The Consultant will provide the marked up plan sheets with both the contractors and inspectors as -built information as well as CAD revisions. 4.2 Physical Completion Letter: Following completion of all punchlist work, prepare physical completion letter to the contractor, and recommend that City and /or Utilities accept the project. 4.3 Project Closeout: Transfer all project documents to the City for permanent storage. • Schedule review comments • As -built schedule • Meeting agendas and notes • Monthly Pay Estimates • Subcontractor Packets • Physical Completion Letter • Final Project Documents Crystal Springs Emergency Repair Page 5 of 7 Construction Man agemen t Services Scope of Work KPG Project Number 16001A 9/19/16 8 HOUR AND FEE ESTIMATE Project: City of Tukwila Crystal Springs Emergency Surface Water Repair Supplement No. 1 - Construction Services EXHIBIT B KPG • Architecture • Landscape Architecture • Civil Engineering Task Description Labor Hour Estimate Total Fee Project Manager $ 162.12 Senior Engineer $ 125.72 Project Engineer $ 109.38 Design Engineer $ 94.29 CAD Technician $ 81.72 Const Inspector $ 112.44 Survey Crew $ 143.82 Senior Admin $ 106.87 Office Admin $ 91.52 Fee Task 1 - Crystal Springs Emergency Surface Water Repair 1.1 Management/Coordination /Administration 2 0 0 0 0 0 0 0 4 $ 690.33 1.2 Preconstruction Services 2 0 0 4 0 16 0 0 8 $ 3,232.64 1.3 Construction Services 4 0 0 40 0 200 0 0 40 $ 30,569.23 1.4 Record Drawings /Closeout 0 0 0 8 4 8 0 0 8 $ 2,712.91 Reimbursable - Mileage $ 400.00 Reimbursable - Reproduction $ 300.00 Reimbursable - Material Testing allowance $ 1,000.00 Reimbursable - Geotechnical review of sinkhole $ 1,000.00 Task 1 Total 8 0 0 52 4 224 0 0 60 $ 39,905.11 Total Estimated Fee: $ 39,905.11 co 9/19/2016 1117 City f Tukwila Allan Ekberg, Mayor T{]: Utilities Committee FROM: Bob KSibermmm, P-E', Public Works Director XfA BY: Greg ViNammeva,NPDES Coordinator CC: Mayor Ekberg DATE: September 23, 2016 SUBJECT: Project N0-95@41210 Surface Water LID Code Amendments — TMC Title 16 Grading ISSUE Review new grading amendments to TMC Title 16 to meet National Pollutant Discharge Elimination System (NPDES) permit requirements. BACKGROUND The City's NPDES Phase U permit requires that the City review, revise, and make effective their local development related codes, rules, standards, and other enforceable documents tO incorporate and require Low Impact Development (L|0) principles and LID Best Management Practices OO later than December 31'2O18.AS part 0f this effort, the City's consultant, C)t8k' reviewed all development codes tO determine which codes required updating t0 facilitate LID iDlp|8DleD18tiOD and [e[DOV8 barriers. The TK8C Title 16 iDC|Ud8S the City's grading [8qUi[8Dl8DLS and it was determined they are not consistent with the Department [f Ecology's ([)C)E) requirements and need tObeupdated. ANALYSIS (]t8k worked with City staff and identified LID code updates needed for Chapter 18.54' Grading. The proposed grading changes are significant and will be consistent with changes King County was required to make to their grading chapter in order for the DOE to consider the King County Surface Water Design Manual equivalent to the DOE Surface Water Design K88OU8|. The substantive changes to the Grading Ordinance are: • Permit Application Requirements * Erosion and Sediment Control Standards °SLandards •|nopooUona • Hazard Damage FINANCIAL IMPACT No financial impact. RECOMMENDATION For iOfO0O8LiOO OD|V. Attachments: Draft Grading Code Revisions inSt*we#**+gh and Underline Form WAPW EnwpnmECrm^ onprojects\N,oES Program (9mw,2,0)TO,nm,r Capacity erant\Om LID Gap An"lysis\Im" Memo 20,o LID LID Code Update Grading aysb.doc 1§1 TITLE 16 — BUILDINGS AND CONSTRUCTION CHAPTER 16.54 GRADING Sections: 16.54.010 Purpose 16.54.020 Authority 16.54.030 Definitions 16.54.040 Applicability 16.54.050 Permit 16.54.055 Permit Application Requirements 16.54.060 Standards 16.54.065 Erosion and Sediment Control Standards 16.54.070 Supplemental Information 16.54.075 Inspections 16.54.080 Hazard and Damage 16.54.085 Financial Guarantees 16.54.090 Exceptions 16.54.100 Penalties 16.54.120 Appeals 16.54.010 Purpose The provisions of TMC Chapter 16.54 shall be liberally construed to accomplish the following purposes: 1. Prevent damage to life, public and private property, surface waters, sensitive areas and associated buffers. 2. Regulate grading activities, including excavation, fill, grading, earthwork construction, and structural preloads. 3. Prevent erosion and control sedimentation. 4. Establish the standards to permit grading activities. 5. Provide for approval and inspection of grading activities. 6. Prevent and minimize disturbance of native soils and landscapes, and restore the moisture holding capacity of disturbed soils. 16.54.020 Authority A. The Public Works Director shall administer TMC Chapter 16.54. The Director's authority includes the establishment of regulations and procedures, approval of permits and exceptions, inspection of work, and enforcement and implementation of measures necessary to carry out the intent of TMC Chapter 16.54. B. The Public Works Director may initiate all required actions to prevent or stop acts or intended acts which the Director determines to constitute a hazard to life or safety, or endanger property, or adversely affect the safety, use or stability of a public or private property or a sensitive area or its buffer. C. If the Director determines that a person is engaged in grading activities that do not comply with City code or with approved permit plans and /or other permit conditions, the Director may implement any or all of the following enforcement actions: 1. Suspend or revoke without written notice any grading activity, when the Director determines that activity poses an immediate danger to life, safety or property. 2. Serve a written notice of violation upon that per- son by registered or certified mail or personal service. The notice shall set forth the measures necessary to achieve compliance, specify the time to commence and complete corrections, and indicate the consequences for failure to correct the violation. 3. Suspend or revoke any City approval for grading activities after written notice is given to the Applicant for any of the following reasons: a. Any violation(s) of the permit or the permit conditions; b. Construction not in accordance with the approved plans; or c. Non - compliance with correction notice(s) or "Stop Work Order(s)" issued for the construction of temporary or permanent storm water management facilities. 4. Post a "Stop Work Order" at the site, directing that all grading activities cease immediately. The "Stop Work Order" may include any discretionary conditions and standards adopted in TMC Chapter 16.54 that must be fulfilled before any work may continue. 16.54.030 Definitions As used in TMC Chapter 16.54, the terms shall be defined as follows: 1. "Applicant" means any person who has applied for a grading permit. 2. "Bench" means a relatively level step excavated into earth material on which fill is to be placed. 23. "Buffer" means the area contiguous to a sensitive area that is required for the continued maintenance, function and structural stability of the sensitive area as defined in the sensitive areas overlay. 4. "Compaction" means the densification of a fill or of existing soils by mechanical or other means, whether intentional or incidental. 5. "Cut" see "Excavation ". 36. "Director" means the Public Works Director or his /her designee, including the City Engineer and Public Works inspectors. 7. "Down Drain" means a device for collecting water from a swale or ditch located on or above a slope and safely delivering it to an approved drainage facility. 8. "Erosion" means the wearing away of land sur- face by the action of wind, water, gravity, or any combination thereof. 59. "Excavation" means the digging or removal of earth material, also referred to as a cut. 610. "Fill" means a deposit of material placed by artificial means. 7-11. "Geotechnical engineering" means the application of soil mechanics in the investigation, evaluation, and de- sign of civil works involving the use of earth materials and the inspection or testing of the construction thereof. IM TUKWILA MUNICIPAL CODE surface. 12. "Grade" means the vertical location of the ground 13. "Grade, Existing" means the grade prior to grading. 14. "Grade, Finished" means the grade of the site at the conclusion of all grading efforts. 915. "Grading" means any activity that results in change of the cover or topography, or any activity that may cause erosion, including clearing, e4EAAVAt;AAexcavatinq, filling, g and stockpiling. 16. "Key" means a compacted fill placed in a trench excavated in earth material beneath the toe of a slope. 817 "Sensitive area" means wetlands, watercourses, areas of potential geologic instability, abandoned coal mines, and fish and wildlife habitat areas, per the City's Sensitive Areas Ordinance. 4-818. "Site" means any legally defined section of real property, whose boundaries are recorded with the King County Assessor's office for the purposes of assessing taxes. 19. "Slope" means an inclined surface, the inclination of which is expressed as a ratio of horizontal distance to vertical distance. 20. "Terrace" means a relatively level step constructed in the face of a graded slope for drainage and maintenance purposes. 16.54.040 Applicability A. TMC Chapter 16.54 applies to all grading activities within the City limits. B. Flood zone grading, excavation and earthwork construction, including fills and embankments, shall comply with the requirements of TMC Chapter 16.52. C. City departments shall comply with all the requirements of TMC Chapter 16.54, except that they are not required to obtain permits and approvals from the City for work per- formed in the public right -of -way, nor for operation and maintenance activities by the Department of Parks and Recreation. 16.54.050 Permit A. A permit is required for all grading activities occurring within the City limits, except the following: 1. Excavation for construction of a structure permitted under the International Building Code. 2. Cemetery graves. 3. Refuse disposal sites controlled by other regulations. 4. Excavations for wells, or trenches for utilities. 5. Mining, quarrying, excavating, processing or stockpiling rock, sand, gravel, aggregate or clay controlled by other regulations, provided such operations do not affect the lateral support of, or significantly increase stresses in, soil on adjoining properties. 6. Exploratory excavations performed under the direction of a registered design professional, as long as this exploratory excavation does not constitute the beginning of construction of a building prior to obtaining a permit. B. Applications for permits pursuant to TMC Chapter 16.54 shall be submitted to the City in the format and manner specified by the TMC 16.54.055. C. An approved grading permit applies to one site. A separate permit shall be obtained for each site. D. The City shall collect a nonrefundable permit fee, the amount set by resolution of the City Council. 16.54.055 Permit Application Requirements A. To obtain a permit, the applicant shall first file an application in writing on a form provided by or approved by the Director that shall include, at a minimum: 1. Identification and description of the work to be covered by the permit for which application is made. 2. An estimate of the quantities of excavation and fill involved by volume and by the total area cleared or graded in square feet and as a percentage of the total site area. 3. Identification and description of: a. all sensitive areas on the site or visible from the boundaries of the site; and b. property- specific development standards and special district overlays. 4. Location of any open space tracts or conservation easements. 5. Plans and specifications that, at a minimum, include: a. property boundaries, easements and setbacks, b. a 1:2000 scale vicinity map with a north arrow. c. horizontal and vertical scale. d. size and location of existing improvements on and within fifty feet of the project, indicating which will remain and which will be removed. e. location of all proposed cleared areas. f. existing and proposed contours at maximum two foot intervals, extending for twenty feet beyond the project edge, that provides sufficient detail to identify how grade changes will conform to the requirements of this code. g. at least two cross sections, one in each direction, showing existing and proposed contours and horizontal and vertical scales. h. a proposed erosion and sediment control plan as required by TMC 16.54.065. 6. A geotechnical report prepared by a registered geotechnical engineer that, at a minimum, includes: a. the nature and distribution of existing soils. b. conclusions and recommendations for grading procedures. c. soil design criteria for any structures or embankments required to accomplish the proposed grading. d. where appropriate, slope stability studies, and recommendations and conclusions regarding site geology. Exception: A geotechnical report is not required where the 13 TITLE 16 — BUILDINGS AND CONSTRUCTION Director determines that the nature of the work applied for is such that a report is not necessary. 7. For sites with mapped maximum considered earthquake spectral response accelerations at short periods (Ss) greater than 0.5g as determined by the adopted International Building Code, Section 1613, a study of the liquefaction potential of the site shall be provided, and the recommendations incorporated in the plans. Exception: A liquefaction study is not required where the Director determines from established local data that the liquefaction potential is low. B. Materials in addition to those required in subsection A. of this section may be necessary for the Director to complete the review. The following materials shall be submitted when required by the Director: 1. Higher accuracy contours and more details of existing terrain and area drainage, limiting dimensions, elevations or finished contours to be achieved by the grading, and proposed drainage channels and related construction. 2. If applicable, all drainage plans and documentation consistent with TMC Chapter 14.30 and the Surface Water Design Manual, as adopted in accordance with TMC Chapter 14.30. 3. Studies prepared by qualified specialists, as necessary to substantiate any submitted materials and compliance with this chapter or other law, particularly if clearing or grading is proposed to take place in or adjacent to an environmentally sensitive area. C. Plans and specifications shall be prepared and signed by a civil engineer if they are prepared in conjunction with the proposed construction or placement of a structure, include permanent drainage facilities or, if required by the Director, propose alterations in steep slope or landslide hazard areas. D. The Director shall determine the number of copies of the required plans, specifications and supporting materials necessary to expedite review and may require submittal of materials in alternative formats. E. The Director may waive specific submittal requirements if they are determined to be unnecessary for the acceptance and subsequent review of an application. F. Any plans, specifications, or supporting materials that are returned as a result of permit denial or any other reason shall be returned to the applicant. 16.54.060 Standards A. All grading activities require erosion prevention and sediment control in accordance with TMC 16.54.065 and commensurate with the degree of risk, as determined by the Director. B. All grading activities shall be undertaken according to the following mandatory standards: 1. All design and construction shall be performed to minimize soil disturbance, to minimize compaction where not required for structural stability, and to maximize erosion prevention and sediment control. 2. All grading activities shall be consistent with: a. The standards given in this chapter. eb. The International Building Code, Chapter 18 , and as may be amended from time to time. 1�c. The Public Works Department's Development Guidelines and Infrastructure Design and Construction Standards. ed. The KiRg QG Rty Surface Water Design Manual,_ App P, and as may be amended from time to time, as adopted in accordance with TMC Chapter 14.30. 4e. Tukwila Municipal Code Chapter 18.45, "Environmentally Sensitive Areas." ef. Policies and procedures set forth by the Director. C. Cuts and fills shall conform to the following provisions unless otherwise approved by the Director: 1. A slope of cut and fill surface shall not be steeper than is safe for both the intended use and soil type and shall not exceed two horizontal to one vertical (50- percent slope) unless the owner or authorized agent furnishes a geotechnical report justifying a steeper slope. The following exceptions can be made for cut surfaces: a. A cut surface shall be permitted to be at a slope of 1.5 horizontal to one vertical (67- percent slope) provided that all of the following are met: 1) it is not intended to support structures or surcharges. 2) it is adequately protected against erosion. 3) it is no more than 8 feet in height. 4) it is approved by the Director. 5) ground water is not encountered. b. A cut surface in bedrock shall be permitted to be at a slope of one horizontal to one vertical (100 - percent sloe 2. All disturbed areas including faces of cuts and fill slopes shall be prepared and maintained to control erosion in compliance with TMC 16.54.065. Erosion control for the slopes shall be installed prior to earthwork and permanent erosion control shall be installed as soon as practicable and prior to call for final inspection. Where necessary, check dams, cribbing, riprap or other devices or methods shall be employed to control erosion and provide safety. 3. The ground surface shall be prepared to receive fill by removing unsuitable material such as concrete slabs, tree stumps, brush, vegetation, topsoil, car bodies and other materials as determined by the Director, and scarifying the ground to provide a bond with the fill material. 4. Except in an approved sanitary landfill, as part of engineered fill, as part of public infrastructure, as part of a stormwater facility or lawn or landscaping, or as approved by the Director, fill material shall meet the following standards: a. Fill material shall consist of earthen material, organic material or recycled or reprocessed materials that are not categorized as dangerous waste under Title 173 WAC and 14 TUKWILA MUNICIPAL CODE that were produced originallV from an earthen or organic material. b. Fill material shall have a maximum dimension of less than twelve inches. c. Recycled concrete shall be free of rebar and other materials that may pose a safety or health hazard. d. Recycled asphalt shall not be used in areas subject to exposure to seasonal or continual perched ground water, in a critical aquifer recharge area or over a sole- source aquifer. ed materials that have not been reprocessed to meet the definition of common borrow in the latest WSDOT Standard Specifications shall be intermixed with well - graded, natural, earthen materials in sufficient quantities and of a suitable size to assure filling of all voids and to assure that the fill can be compacted to ninety percent of the maximum density. 5. Provisions shall be made to: a. prevent anV surface water or seepage from damaging the cut face of any excavation or the sloping face of a fill. b. address anv surface water that is or miaht be concentrated as a result of a fill or excavation to a natural watercourse in accordance with TMC Chapter 14.30 and the Surface Water Design Manual. 6. Benches and anV swales or ditches on benches shall be designed in accordance with the Surface Water Design Manual. 7. All cut and fill slopes shall meet the following setback requirements: a. Cut and fill slopes shall be set back from Property lines as shown in Figure 16 -6, Drainage Dimensions, to preserve the safety of adjacent properties, provide for adequate foundation support, prevent damage from runoff or erosion of the slopes, and preserve the permitted uses on the adjacent properties, unless substantiating data is submitted justifying reduced setbacks. Setback dimensions shall be measured perpendicular to the property line. b. The setback at the top of a cut slope shall not be less than shown in Figure 16 -6, Drainage Dimensions, or than is required to accommodate anV required interceptor drains, whichever is greater. c. Where required to protect adjacent properties at the toe of a slope from adverse effects of the grading, additional protection, approved by the Director shall be included. Such protection maV include but shall not be limited to: 1) setbacks greater than those required bV Figure 16 -6, Drainage Dimensions. 2) provisions for retaining walls or similar construction. 3) erosion protection of the fill slopes. 4) provision for the control of surface waters. 8. Fill shall meet the following standards: a. Fill greater than 18 inches in depth shall be engineered and compacted to accommodate the proposed use in accordance with the applicable standard unless a notice on title documenting the location of the fill is recorded and the fill is sufficiently stable to not pose a hazard, as follows: 1) Fill material at the location of proposed buildings shall be compacted to 90 percent of maximum density as determined by ASTM D 1557, Modified Proctor, in lifts not exceeding 12 inches in depth, unless another compaction is recommended in the geotechnical report. 2) Fill material at the location of proposed public infrastructure, such as streets and roads, shall be compacted in accordance with the Infrastructure Design and Construction Standards. 3) Fill material, including imported soils and compost, at the location of a proposed stormwater facility or placed as part of earthwork construction of a stormwater facility shall be compacted in accordance with the Surface Water Design Manual and TMC 14.30. 4) Fill material at the location of proposed landscape areas, including lawn, shall be compacted in accordance with TMC 16.54.060(1). b. Where existing grade is at a slope steeper than five horizontal to one vertical (20- percent slope) and the depth of the fill exceeds 5 feet benching shall be provided in accordance with Figure 16 -5, Benching Details. A key shall be provided which is at least 10 feet in width and 2 feet in depth. c. Any fill in the floodplain shall, from the face of the fill to a horizontal distance of six feet back from the face, meet the compaction requirements for pond embankments in the Surface Water Design Manual, unless determined by the department that inundation is not a threat to fill integrity. D. Access roads to grading sites shall be: 1. Maintained and located to the satisfaction of the Director to minimize problems of dust, mud and traffic circulation. 2. Located where the permanent access to the site is proposed in the permit application to minimize site disturbance. 3. Controlled bV a gate when required bV the Director. E. Signs warning of hazardous conditions, if determined by the Director to exist on a particular site, shall be affixed at locations as required by the Director. F. Where required bV the Director, to protect life, limb and Property, fencing shall be installed with lockable pates that must be closed and locked when not working on the site. The fence shall be no less than six feet in height and the fence material shall have no opening larger than two inches. G. Rocks, dirt, mud, vegetation, topsoil, duff laver and any other materials stripped from, imported onto, used or produced on -site in the course of permitted activities shall not be spilled onto, stockpiled, or otherwise left on public roadways or on any off -site property not specifically authorized as a receiving site under a valid permit. H. The duff laver and native topsoil shall be retained in an undisturbed state to the maximum extent practicable. Any duff laver or topsoil removed during grading shall be stockpiled to the IN TITLE 16 — BUILDINGS AND CONSTRUCTION maximum extent practicable on -site in a designated, controlled area not adjacent to public resources or to environmentally sensitive areas. The material shall be reapplied to other portions of the site where feasible. I. The soil moisture holding capacitV of the soil shall be restored as follows: 1. Except as otherwise provided in subsection 1.2. of this section, areas that have been cleared and graded shall have the soil moisture holding capacity restored to that of the original undisturbed soil native to the site to the maximum extent practicable. The soil in anV area that has been compacted or that has had some or all of the duff laver or underlying topsoil removed shall be amended to mitigate for lost moisture - holding capacity. The amendment shall take place between MaV 1 and October 1. The topsoil laver shall be a minimum of eight inches thick, unless the applicant demonstrates that a different thickness will provide conditions equivalent to the soil moisture - holding capacity native to the site. The topsoil laver shall have an organic matter content of between five to ten percent drV weight and a pH suitable for the proposed landscape plants. When feasible, subsoils below the topsoil laver should be scarified at least four inches with some incorporation of the upper material to avoid stratified lavers. Compost used to achieve the required soil organic matter content must meet the definition of "composted materials" in WAC 173 - 350 -220. 2. This subsection does not applV to areas that at protect completion are covered by an impervious surface, incorporated into a drainage facilitV or engineered as structural fill or slope. J. Drainage and terracing shall be provided as follows, except where the ground slope is not steeper than three horizontal to one vertical (33- percent slope): 1. Terraces at least 6 feet in width shall be established at not more than 30 -foot vertical intervals on all cut or fill slopes to control surface drainage and debris. Suitable access shall be provided to allow for cleaning and maintenance. Where more than two terraces are required, one terrace, located at approximatelV mid - height, shall be at least 12 feet in width. 2. Swales or ditches shall be provided on terraces. They shall have a minimum gradient of 20 horizontal to one vertical (5- percent slope) and shall be paved with concrete not less than 3 inches in thickness, or with other materials suitable to the application. TheV shall have a minimum depth of 12 inches and a minimum width of 5 feet. A single run of swale or ditch shall not collect runoff from a tributarV area exceeding 13,500 square feet (projected) without discharging into a down drain. 3. Interceptor drains shall be installed along the top of cut slopes receiving drainage from a tributarV width greater than 40 feet, measured horizontally. They shall have a minimum depth of 1 foot and a minimum width of 3 feet. The slope shall be approved by the Director, but shall not be less than 50 horizontal to one vertical. The drain shall be paved with concrete not less than 3 inches in thickness, or bV other materials suitable to the application. Discharge from the drain shall be accomplished in a manner to prevent erosion and shall be approved by the Director. 4. Drainage across propertV lines shall not exceed that which existed prior to grading. Excess or concentrated drainage shall be contained on site or directed to an approved drainage facility. Erosion of the ground in the area of discharge shall be prevented by installation of nonerosive down drains or other devices. 16.54.065 Erosion and Sediment Control Standards A. A person who clears, grades or otherwise disturbs a site shall provide erosion and sediment control that prevents, to the maximum extent practicable, the transport of sediment from the site to drainage facilities, rights- of -waV, water resources and adjacent properties. Erosion and sediment controls shall be applied as specified bV the temporarV erosion and sediment control measures and performance criteria and implementation requirements in the Surface Water Design Manual. B. From October 1 through April 30, which is the seasonal limitation period, clearing and grading shall onlV be permitted if shown to the satisfaction of the Director that runoff leaving the construction site will comply with the erosion and sediment control measures and performance criteria and implementation requirements in the Surface Water Design Manual through a combination of the following: 1. Site conditions including vegetative coverage, slope, soil type, and proximitV to receiving waters; 2. Proposed limitations on activities and the extent of disturbed areas; and 3. Proposed erosion and sedimentation control iflTx1�1ic�13 C. Based on the information provided under subsection A. of this section, the Director may expand or restrict the seasonal limitations on site disturbance. The Director shall set forth in writing the basis for approval or denial of clearing or grading during the seasonal limitation period. D. During the seasonal limitation period, clearing and grading will be allowed only if there is installation and maintenance of an erosion and sedimentation control plan approved by the Director that defines any limits on clearing and grading or specific erosion and sediment control measures required during the seasonal limitation period. The department may require or approve alternate best management practices. E. If, during the course of construction activity or soil disturbance during the seasonal limitation period, silt -laden runoff violating standards in the Surface Water Design Manual leaves the construction site or if clearing and grading limits or erosion and sediment control measures shown in the approved plan are not maintained, a Violation Notice and Order shall be issued in accordance with TMC 8.45.050. F. If the erosion and sediment control problem defined in the Violation Notice and Order is not adequately repaired within 11111 TUKWILA MUNICIPAL CODE twenty -four hours of issuance, then a Stop Work Order may be issued in accordance with TMC 8.45.070 until such time as adequate erosion and sediment control measures to stop silt - laden runoff from leaving the site are installed. The Stop Work Order may also require the property owner to discontinue any further clearing or grading, except for erosion and sediment control maintenance and repair, until the following April 30. G. The following activities are exempt from the seasonal limitations of this section: 1. Routine maintenance and necessary repair of erosion and sediment control facilities. 2. Routine maintenance of public facilities or existing utility structures that do not expose the soil or result in removal of the vegetative cover to the soil. 3. Activities where there is one hundred percent infiltration of surface water runoff within the site in approved and installed erosion and sedimentation control facilities. 4. Typical landscaping activities of existing single family residences that do not require a permit. 5. Class I, II III and IV special forest practices in accordance with chapter 76.09 RCW. 6. Response to emergencies that threaten the public health, safety or welfare. 16.54.070 Supplemental Information A. The Director may require supplemental studies, inspections, or testing by an approved testing agency to be performed at the owner's expense. B. The Director may require a Hold Harmless Agreement for activities in or near a sensitive area, or for a deviation from standards set forth in TMC 16.54.060. 16.54.075 Inspections A. Inspections shall be governed by Section 109 of the International Building Code adopted in accordance with TMC 16.04.020. B. The Director may require a special inspection as described in Section 1704.7 of the International Building Code adopted in accordance with TMC 16.04.020. 16.54.080 Hazard and Damage A. A person conducting clearing or grading shall protect adjacent property, public resources including surface and groundwaters, rights -of -way, and drainage systems from hazards and damage resulting from activities allowed under this chapter. 16.54.080 -085 Financial Guarantees A. The Director may require a maintenance bond for erosion prevention and sediment control in the amount of 10% of the total project cost on projects which clear more than 6,000 square feet or contain or abut sensitive areas such as, but not limited to, Class 2 or steeper slopes, wetlands, or critical drainage. B. If the Director determines the nature of any work creates a hazard to human life, endangers public or private property or sensitive areas, the Director may require the applicant to file a Certificate of Insurance. The Director, based on the nature of the risks involved, shall determine the amount of insurance. 16.54.090 Exceptions The Director may grant a written variance from any requirements of TMC Chapter 16.54 if there are exceptional circumstances applicable to the site such that strict adherence to these provisions will not fulfill the intent of TMC Chapter 16.54. 16.54.100 Penalties A. Any violation of any provision, or failure to comply with any of the requirements of TMC Chapter 16.54, shall be subject to the terms and conditions of TMC Chapter 8.45, "Enforcement ". B. The City Attorney shall bring injunctive, declaratory, or other actions as necessary to ensure compliance with TMC Chapter 16.54. Any person failing to comply with TMC Chapter 16.54 shall be subject to a civil penalty not to exceed $1,000 for each violation. Each violation or each day of non- compliance constitutes a separate violation. C. A notice in writing shall impose the penalty provided for in TMC Chapter 16.54 by certified mail, either with return receipt requested or by personal service, to the person incur- ring the notice. The notice shall describe the violation with reasonable particularity, and order the act or acts constituting the violation or violations to cease and desist or, in appropriate cases, require necessary corrective action within a specific and reasonable time. D. A schedule of penalty fees pursuant to TMC Chapter 16.54 is subject to review by the Tukwila City Council. 16.54.120 Appeals A decision of the Director made in accordance with TMC Chapter 16.54 shall be considered determinative and final. Any appeal must be filed in King County Superior Court within 30 days of the date of issuance of the final determination. IVA TITLE 16 — BUILDINGS AND CONSTRUCTION FILL SLOPE TOP OF FILL NATURAL SLOPE 5 FT. OR GREATER �� l w►^ 1� '� 11 55 Figure 16 -5 Benching Detail PROPERTY H/5 BUT 2 FT ! MINIMUM AND NEED NOT EXCEED TOE OF 20 FT MAXIMUM 1 SLOPE NATURAL OR FINISH GRADE Figure 16 -6 Drainage Dimensions I UNSUITABLE 2 FT. MINIMUM MATERIAL IGhMu11111101 1= 3:12!,[01MII1,Ct 61:4 WA H/5 BUT 2 FT MINIMUM AND NEED NOT EXCEED 10 FT MAXIMUM CUT OR FILL SLOPE 6 FT. MINIMUM TERRACE TOP OF SLOPE DRAINAGE DIMENSIONS NATURAL OR FINISH GRADE INTERCEPTOR DRAIN (IF REQUIRED) 18