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HomeMy WebLinkAbout25-045 - Amendment A - Herrera Environmental Consultants, Inc. - Design Services: Chinook Wind ExtensionCity of Tukwila Agreement Number: 25-045(a) Council Approval 9/8/25 6200 Southcenter Boulevard, Tukwila WA 98188 CONTRACT FOR SERVICES Amendment #1 Between the City of Tukwila and Herrera Inc. That portion of Contract No. 25-045 between the City of Tukwila and Herrera Inc. for the project titled Chinook Wind Extension — Design Services is hereby amended as follows: Section 2, Scope of Services: The following language shall be added to the end of the existing Section 2: In addition, work under this contract shall include reimbursement for services, direct expenses, and costs associated with the additional contract scope of services as described in Exhibit A- 1 and B-1, attached. Section 3: Duration of Agreement; Time for Performance: Section 3 is hereby amended to read as follows: This Agreement shall be in full force and effect for a period commencing upon execution and ending December 31, 2025, unless sooner terminated under the provisions hereinafter specified. Work under this Agreement shall commence upon written notice by the City to the Consultant to proceed. The Consultant shall perform all services and provide all work product required pursuant to this Agreement no later than December 31, 2025 unless an extension of such time is granted in writing by the City. Section 4, Payment: Section 4A is hereby amended to read as follows: Payment for the work provided by the Consultant shall be made as provided on Exhibits `B" provided that the total amount of payment to the Consultant for that work shall not exceed $99,987. 00 without express written modification of the Agreement signed by the City. Payment for the work provided by the Consultant shall be made as provided on Exhibit A-1 and B-1 attached hereto, provided that the total amount of payment to the Consultant for that work shall not exceed $121,825.00 without express written modification of the Agreement signed by the City. The maximum amount payable under this contract as amended inclusive of all fees and other costs shall not exceed $121,825.00 without express written modifications of the Agreement signed by the City. 30 CA Reviewed May 2020 Page 1 of 2 City of Tukwila 6200 Southcenter Boulevard, Tukwila WA 98188 (D All other provisions of the contract shall remain in full force and effect. Dated this 9th day of September 12025 CITY OF TUKWILA CONTRACTOR: Signed by: By: Thomas McLeod, Mayor ATTEST/AUTH ENTI CATED: Signed by: Andy Youn-Barnett, City Clerk APPROVED AS TO FORM: Signed by: (l a_ A Office of the City Attorney Printed Name: Theresa M. Wood Title: Vice President CA Reviewed May 2020 Page 2 of 2 31 QAJ. Science + Planning + Design i l' l r; % PRIL/11=11A, -� i all On November 13, 2024, Mike Perfetti authorized Herrera Environmental Consultants (Herrera) to prepare a scope of work and cost estimate to perform engineering design for the City of Tukwila (the City). An initial scope and budget were agreed to on February 10, 2025. On May 29, 2025, Joshua Hopkins authorized Herrera to revise the scope and budget based on discussions to date with King County. Herrera will advance the preliminary Duwamish shoreline restoration design developed for the Tukwila Public Works Administrative Campus project as a separate project and, in this initial step, evaluate the feasibility of integrating the design with the King County (the County) Chinook Wind Mitigation project. The revised project will be referenced as the Chinook Wind Extension Project. This scope of work includes a discussion of the activities, assumptions, deliverables, and a schedule associated with this project. 111111)iiIir c Herrera's project manager, Christina Merten, will be responsible for ongoing administration of the project, including preparing invoices and progress reports, as well as coordination of work efforts with the designated client point of contact (Josh Hopkins or Mike Perfetti). Herrera's project manager will have phone and e-mail contact with the City on an as -needed basis. Herrera will use an established system of quality assurance/quality control review to ensure high quality deliverables that comply with the requirements of the scope of work, as well as provide responsive and technically accurate work product. Work products will be reviewed by technical leads, technical editors, the project manager, and ultimately by the Principal In Charge and Licensee of Record, Jeff Parsons. IIII 6II iiii Milia Ilbh lies e Herrera PM will attend virtual project status update meetings for up to 30 minutes per month. e Progress reports and invoices. July 23, 2025 08574_scopeofwork_update_july_2025_clean.dooc 32 Page 1 of 4 a .VIII ii hili �g Couiiiiirllty111Ieseinre111111°� iuur lour° iuur�� Coo ird hili iuu hili iuu Herrera will work with the City and the County Mitigation Reserve Program to determine what revisions to the Chinook Wind Mitigation Site will be allowed by the County and the Interagency Review Team (IRT) that regulates the Chinook Wind Mitigation Site. Work will include revision of hydraulic models for the combined sites based on updates to the Shoreline Restoration Design Development level grading design developed in 2024. It is anticipated that this updated grading plan (Conceptual Grading Option 3) would be to a 30% design level of detail. Herrera will hold an internal design charette with our geomorphologists, restoration engineers, landscape architects, and mitigation specialists to refine the Option 3 design based on modeling results. Herrera will then meet with the City and County for a design workshop to review modeling results and recommended refinements. If the workshop results in additional refinements to be made that would affect model results, Herrera will refine the design and conduct a second model run that incorporates the new configuration. Herrera will then coordinate an updated design workshop between the City and County to review all modeling results to date and determine if any additional design refinements are needed or suggested. If design refinements are identified that would affect model results Herrera will conduct a third model run to determine potential effects of design refinements. If the design refinements do not result in changes that need to be modeled, Herrera will run the model on the design option with the least grading (Option 1 or 2) to determine project results if the Tukwila site is not fully integrated with the Chinook Wind mitigation area. Up to two meetings each with the Muckleshoot Indian Tribe and County outside of design charettes to review potential updated shoreline restoration concepts and modeling results are included. Herrera will produce a web map to support collaborative review and decision-making as part of this Task. The web map will be hosted within Herrera's ArcGIS Enterprise environment, and will allow authorized users from the City, County and Muckleshoot Indian Tribe to explore both existing conditions and up to two proposed design scenarios for the project area. Each scenario will be represented as a separate set of data layers, enabling viewers to toggle individual layers on and off to compare elements such as topography, habitat types, trails and parcel boundaries. This work will involve coordinating meetings, attending meetings, and documenting action items and key decisions made during meetings. Meetings will be held between February through October 2025. Based on discussions and agreements arrived at during meetings, Herrera will meet with the City and County to determine what constraints may be placed on the overall design and performance standards for the project that would need to be documented in a Memorandum of Understanding (MOU). Herrera will then work with the City and County to draft a MOU to document decisions that will influence the design of the Chinook Wind Extension project going forward. This MOU will be submitted to the City in draft format by December 31, 2025 for the City to finalize and receive agreement on with the County once IRT agreement is reached for the revised design. July 23, 2025 tw08574_scopedwork_u pdate_j u ly_2025_clea n. dooc Page 2 of 4 33 esu ,� IIID °°' ' IIII i o IIID • The City and Herrera staff will attend a virtual project kickoff meeting for up to 2 hours to discuss project design focus and needs. Herrera project manager and technical staff will attend the meeting, which will include a landscape architect, restoration engineers, and biologists. (This has been completed as of the July scope update) • The County will share with the team the one-dimensional hydraulic model developed to design the original Chinook Wind Mitigation Site project. (This has been completed as of the June scope update) • Topographic information from the Chinook Wind Mitigation Site as -built and the existing Tukwila shoreline restoration model will be merged into a single topographic surface. (This has been completed as of the July scope update) • Hydraulic modeling created for the Tukwila Public Works Administrative Campus will be updated for existing conditions and up to three alternatives of minor site adjustments based on advancement of 30% design. • Profile for the proposed alignment for a flow through or high flow flow-through to convey slope gradient for sediment transport and erosion and supporting cross sections at key transitions to slope relationship for scour and to also illustrate habitat types based on elevations. • The model software to be used will be HEC -RAS 2D. • No new topographic survey will be required. • The design concept and modeling does not evaluate or consider sea level rise or other projected climate changes. • Coordination does not include coordination or meetings with the Federal Emergency Management Agency (FEMA) or Conditional Letter of Map Revision (CLOMR) regarding revisions to design and hydraulic model results. • CLOMR/LOMR assistance will be limited to providing planning level cost estimates for obtaining CLOMR/LOMR based on model results described elsewhere in this SOW. • Herrera will coordinate, attend, and provide documentation of action items and key decisions made during meetings for up to eight virtual meetings, including design charettes and workshops, with the County, the City, the IRT, and/or the Muckleshoot Indian Tribe for up to 2 hours each. • Herrera will host a web map for the duration of this Task that will allow for up to three external read-only logins allowing City, County, and Muckleshoot Indian Tribe to access a read-only web map. Web map will allow users to export information but will not allow for editing. Web map will be designed for ease of use and visual comparison, but not for mor advance tools such as swiping or commenting functionality. • July 23, 2025 tw08574_scopedwork_u pdate_j u ly_2025_clea n. dooc 34 Page 3 of 4 • King County will provide the City a summary of the potential effects on mitigation credits based on revised habitat types and areas for the combined sites. • King County will provide Herrera site monitoring data or summaries that have been conducted to date at the Chinook Wind site to inform design refinements. • Task does not cover any permit applications or revisions to applications. IIII 6II iiii Milia Ilbh lies • ArcGIS Enterprise environment Web Map hosted through December 2025 with up to three external read-only logins. • Draft (MS Word version) and Final (PDF version) meeting action items and key decisions within 2 weeks of meetings, design charettes, or workshops. • Draft (MS Word version) and Final (PDF version) technical memo summarizing hydraulic modeling results based on 30% grading design update agreed to during meetings with the City, IRT and Muckleshoot Indian Tribe. • Draft (MS Word version) and Final (PDF version) technical memo describing mitigation options and potential mitigation habitat value (in summary table format) for work on the City -owned property and any proposed changes to Chinook Wind Mitigation Site habitat types, including visuals for IRT presentation support. • Draft (MS Word version) of MOU between the City and the County documenting decisions captured in meeting minutes. July 23, 2025 tw08574_scopedwork_u pdate_j u ly_2025_clea n. dooc Page 4 of 4 Cos stimate for Herrera Labor based on: Marten, Christina Parsons, Jeff Van Orden, Emma Forester, Kate Rapoza, Danielle Crickmore, Ian David Fox, Michelle Marshall, Eric Webber, Michael Dendall, Tamara Nichols, Allison Lux, Gretchen Holtz, Liza (Mary) Trolio, Nicole Siegel, Andrew ERRERA Chinook Wind Extension Project 24-08574-000 Burdened Labor Rates Scientist VI I Engineer VI Engineer 11 Landscape Architect VI Scientist III GIS Analyst V Administrative Coordinator III CAD Designer V Project Accountant 111 Engineer Engineer 111 Scientist V Landscape Designer 11 Marketing Specialist IV GIS Analyst III IB i Task No. $316.87 23 54 77 $305.33 4 51 55 $163.24 4 110 114 $254.78 4 43 47 $154.17 4 66 70 $203.24 2 4 6 $130.27 1 12 13 $189.17 4 30 34 $148.66 15 15 $127.08 1 40 41 $177.05 1 6 7 $257.49 1 16 17 $136.88 4 68 72 $163.07 16 16 $162.63 27 27 r Task Total Hours per 68 � 543 611 Subtotal Labor $15,430 I $106,394 I $121,825 Subtotal Herrera Labor $15,430 I $106,394 I $121,325 Grand Subtotal $15,430 I $106,394 I $121,825 Grand Total Note: Herrera adjusts labor rates annually in January unless contract specifies otherwise.