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ITEM 19
City Council Memorandum Public Works & Utilities Memo No. CP24-130
Date:
April 1, 2024
To:
Mayor and Council
Thru:
Joshua H. Wright, City Manager
Andy Bass, Deputy City Manager
John Knudson, Public Works and Utilities Director
Daniel Haskins, CIP Engineering Senior Manager
From:
Melanie Sikes, Senior Engineer
Subject:
Professional Services Agreement No. WW2402.201, with Wilson Engineers, LLC, for the Loop 101/202 Redundant 66-inch Sewer Line
Design
Services
Proposed Motion:
Move City Council award Professional Services Agreement No. WW2402.201, to Wilson Engineers, LLC, for the Loop 101/202 Redundant 66-inch Sewer Line
Design
Services, in an amount not to exceed $498,550.
Background/Discussion:
In February 2018, Chandler's potable water distribution system experienced a large water main break northeast of Price Road and the Loop 101/202 Santan Freeway interchange. This water line was accessed, repaired and recently put back into service. Findings from a subsequent water line assessment raised concerns about a large 66" sewer line that also exists adjacent to these water lines crossing under the freeway. This sewer line transmits wastewater flows from north Chandler south to the Ocotillo Water Reclamation Facility for treatment. This large sewer line was installed at the same time as the water main crossing during the construction of the freeway interchange. The city's 2018 Water, Wastewater, and Reclaimed Water Master Plan also analyzed this 66-inch sanitary sewer freeway crossing and system redundancy. The evaluation noted the lack of redundancy for the sanitary sewer sytem crossing the freeway from north to south and the need in the near future to rehabilitate the existing freeway sewer crossing.
This project includes the design of a redundant 66-inch sanitary sewer under the Loop 202 freeway, rehabilitating the existing 66-inch sanitary sewer, diversion structures, and the 48-inch sanitary sewer north of Loop 202. The project scope of work consists of project management, data collection, utility coordination, design services, and permitting. The agreement completion time is 480 calendar days following Notice to Proceed.
Evaluation:
The selection process was conducted in accordance with city policy and procedure and state law. This project is being performed under the On-Call Consultant Pre-Qualified List for Water and Wastewater Services. Staff recommends approval of this agreement with Wilson Engineers, LLC, based on qualifications, relevant firm experience, team experience, project understanding, and project approach.
Fiscal Impact
Account No.
Fund Name
Program Name
Dollar Amount
CIP Funded Y/N
611.3910.6817.6WW266
Wastewater Bonds
Sewer Assessment & Rehabilitation
$498,550
Y
Attachments
Location Map
Agreement - Wilson Engineers, LLC
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