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2025-28 Mark Thomas & Company - Prof Eng Services Project 2019-02 Ave 50 Bridge - Amend 1MEMORANDUM DATE: October 13, 2025 TO: Jon McMillen,City Manager FROM: Carley Escarrega, Administrative Technician ta Qa�tra CALIFORNIA RE: Mark Thomas & CO - Amendment no. 1 - Avenue 50 Bridge Project 2019-02 Please list the Contracting Party / Vendor Name, any change orders or amendments, and the type of services to be provided. Make sure to list any related Project No. and Project Name. Authority to execute this agreement is based upon: ❑✓ Approved by City Council on February 20, 2024 - B2 ❑ City Manager's signing authority provided under the City's Purchasing & Contracting Policy [Resolution No. 2023-008] for budget expenditures of $50,000 or less. R .❑ .❑ NOTE. City Manager's signing authority provided under the City's Personnel Policy Section 3.2 for temporary employment positions. Department Director's or Manager's signing authority provided under the City's Purchasing Policy [Resolution No. 2023-008] for budget expenditures of $15,000 and $5,000, respectively, or less. Procurement Method (one must apply): Bid W] RFP ❑ RFQ ❑ 3 written informal bids Sole Source ❑ Select Source ❑ Cooperative Procurement Requesting department shall check and attach the items below as appropriate. Agreement payment will be charged to Account No.: 401-0000-60185-201902-D Agreement term: Start Date February 20, 2024 Amount of Agreement, Amendment, Change Order, etc End Date $ 0.00 June 30, 2028 z. Signing authorities listed above are applicable on the acrgregate Agreement amount, not individual Amendments or Change Orders! Insurance certificates as required by the Agreement for Risk Manager approval Approved by: Oscar Mojica (MyCOI) Date: 10/10/2025 Bonds (originals) as required by the Agreement (Performance, Payment, etc.) Conflict of Interest Form 700 Statement of Economic Interests from Consultant(s) Review the "Form 700 Disclosure for Consultants" guidance to determine if a Form 700 is required pursuant FPPC regulation 18701(2) Business License No. 077211 1-2024 Expires: 05/31 /2026 Requisition for a Purchase Order has been prepared (Agreements over $5,000) AMENDMENT NO. 1 TO AGREEMENT FOR CONTRACT SERVICES WITH MARK THOMAS & COMPANY This Amendment No. 1 ("Amendment 1") to Agreement for Contract Services ("Agreement") is made and entered into as of the 22nd day of September, 2025, ("Effective Date") by and between the City of La Quinta ("City"), a California Municipal Corporation and Charter City organized under the Constitution and laws of the State of California with its principal place of business at 78495 Calle Tampico, La Quinta, California 92253, and Mark Thomas & Company, a Corporation ("Contracting Party"). RECITALS WHEREAS, on or about February 20, 2024, the City and Contracting Party entered into an Agreement to provide Professional Engineering Services related to preparing the plans, specifications, and engineer's estimate for the Avenue 50 Bridge Project, for a total not to exceed amount of $2,332,864.66. The term of the Agreement expires on June 30, 2028 ("Initial Term"); and WHEREAS, the City and Contracting Party mutually agree to amend Section 1.1 Scope of Services and related Exhibit A of the Agreement to include Optional Task 7.2 Transportation Study as modified in detail in Exhibit A of this amendment. NOW THEREFORE, in consideration of the mutual covenant herein contained, the parties agree as follows: AMENDMENT In consideration of the foregoing Recitals and the covenants and promises hereinafter contained, and for good and valuable consideration, the sufficiency and receipt of which are hereby acknowledged, the parties hereto agree as follows: Section 1.1 Scope of Services is amended to read as follows: 1.1 Scope of Services. In Compliance with all terms and conditions of this Agreement, Contracting Party shall provide those Professional Engineering Services related to preparing the plans, specifications, and engineer's estimate for the Avenue 50 Bridge Project (Federal Project No. NBIL (547)), (City Project No. 2019-02), as specified in the "Scope of Services" attached hereto as "Exhibit A" and incorporated herein by this reference (the "Services"). Contracting Party represents that Contracting Party is experienced in performing the Services contemplated herein and, in light of such status and experience, Contracting Party covenants that it shall follow industry standards in performing the Services required hereunder, and that all materials, if any, will be of good quality, fit for the purpose intended. For purposes of this Agreement, the phrase "industry standards" shall mean those standards of practice recognized by other members of the Contracting Members profession performing similar services under similar circumstances. 2. "Exhibit A" — Scope of Services is amended to include Optional Task 7.2 Transportation Study as modified in detail in Exhibit A, attached to this Amendment No. 1, and incorporated herein by this reference. In all other respects, the original Agreement shall remain in effect. IN WITNESS WHEREOF, the City and Contracting Party have executed this Amendment No. 1 to the Aareement on the respective dates set forth below. CITY OF LA QUINTA a California municipal corporation cMILLEN, City Manager City of La Quinta, California Dated: 10 (ID jZbZS ATTEST: 64 MONIKA RADEVA, City erk City of La Quinta, California APPROVED AS TO FORM: WILLIAM H. IHRKE, City Attorney City of La Quinta, California MARK THOMAS & COMPANY Corporation SIGNED IN COUNTERPART Zach Siviglia President/CEO Dated: In all other respects, the original Agreement shall remain in effect. IN WITNESS WHEREOF, the City and Contracting Party have executed this Amendment No. 1 to the Agreement on the respective dates set forth below. CITY OF LA QUINTA a California municipal corporation SIGNED IN COUNTERPART JON McMILLEN, City Manager City of La Quinta, California Dated: SIGNED IN COUNTERPART MONIKA RADEVA, City Clerk City of La Quinta, California /.\»00TLA21e7_1ato] I;IM LVAI SIGNED IN COUNTERPART WILLIAM H. IHRKE, City Attorney City of La Quinta, California MARK THOMAS & COMPANY Corporation �ach Siviglia President/CEO Dated: 10/10/25 Exhibit A Scope of Services TASK 7.2. TRANSPORTATION STUDY To assist with air quality and noise assessments and to develop intersection pavement marking layout, storage lengths, and signal timing updates, Fehr & Peers will utilize RIVCOM to develop peak hour forecasts at the intersection Washington Street & Avenue 50 and daily traffic forecasts on Avenue 50 from Washington Street to Park Ave. We will collect traffic volume data during fair weather, while school is in session, and during a typical (non -holiday, non-event) Tuesday, Wednesday, or Thursday. Given seasonal travel trends in the Coachella Valley, traffic counts will be collected between January and March when traffic volumes are the highest. Intersection peak period data will be collected during typical commute periods (7:00 — 9:00 AM, 4:00 — 6:00 PM). Vehicle classification and bicycle and pedestrian peak hour counts will be collected. The daily traffic counts (up to two 24-hour roadway counts) with vehicle classification (truck percentage) and speed will be performed on the study roadway. Forecasts for the design year (2045) will be prepared by applying the Difference Method, which adds traffic growth from RIVCOM base to future year models to existing counts, consistent with National Cooperative Highway Research Program (NCHRP) Report 765. Forecasts for the opening year will be prepared by linearly interpolating between the base year and the design year. The following will be documented in Excel format: • AM and PM Peak Hour Intersection Level of Service (LOS) and average vehicle delay for the Avenue 50 and Washington Street intersection • AM, PM, and Off -Peak average speed along Avenue 50 between Washington Street and Park Avenue • VMT along Avenue 50 between Washington Street and Park Avenue • Medium and heavy vehicle percentages along Avenue 50 between Washington Street and Park Avenue • ADT along Avenue 50 between Washington Street and Park Avenue This scope assumes the project 4-lane, westbound approach to the intersection will drop the second lane into a right turn only to accommodate the newly painted Avenue 50 `Road Diet' project west of Washington Street.