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ITEM  39 City Council Memorandum      Public Works & Utilities  Memo No. CP25-059         Date: November 4, 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, Capital Projects Division Manager From: Melanie Sikes, Principal Engineer Subject: Construction Manager at Risk (CMAR) Pre-Construction Services Agreement No. WW2402.251, with B&F Contracting, Inc., for the Loop 101/202 Redundant 66-inch Sewer Line

Proposed Motion:

Move City Council award CMAR Pre-Construction Services Agreement No. WW2402.251, to B&F Contracting, Inc., for the Loop 101/202 Redundant 66-inch Sewer Line, in an amount not to exceed $504,949.47.

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-inch sewer line that also exists adjacent to these water lines crossing under the freeway. This sewer line conveys 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 system crossing the freeway from north to south and the need in the near future to rehabilitate the existing freeway sewer crossing. The project includes the 66-inch diameter gravity sewer line segment (approximately 800 linear feet) and steel casing for protection under the Loop 202 Santan Freeway. In addition, this project includes rerouting of several 48-inch diameter gravity lines that are approximately 2,000 linear feet in length and four junction structures for connecting the existing gravity lines to the proposed redundant 66-inch gravity line. Further, the project services will include cured-in-place pipe (CIPP) lining of existing 66-inch diameter sewer, 48-inch diameter sewer, and 30-inch diameter sewer. The project scope of work consists of meetings and workshops, reviews, schedule development, utility and site investigations, cost models, Guaranteed Maximum Price preparation, public outreach, geotechnical analysis, and coordination with the Arizona Department of Transportation. The agreement completion time is 365 calendar days following Notice to Proceed.

Evaluation:

The selection process was followed in accordance with city policy and procedure and state law. Staff recommends agreement award to B&F Contracting, Inc., 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 615.3910.6210.6WW694 Wastewater Operating Santan Freeway Redundant 66-inch Se $504,949.47 Y

Attachments Location Map Agreement - B&F Contracting

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