Title
Construction Administration and Inspection Services for SROG-SRO CIPP-Liner Defect (Ordinance S-43925)
Description
Request to authorize the City Manager, or his designee, to enter into an amendment to contract 137750 with Brown and Caldwell, Inc., to provide Construction Administration and Inspection (CA&I) services not to exceed $300,000 in support of the Sub-Regional Operating Group (SROG) Salt River Outfall (SRO) Interceptor CIPP-Liner Defect - 2nd Place & Watkins project. Further request authorization for the City Controller to disburse all funds related to this item.
Report
Summary
The SRO was installed in the 1960s. It was an unlined reinforced concrete pipe. Chemical processes in the wastewater caused deterioration of the pipe, requiring it to be rehabilitated with a structural cured-in-place-pipe (CIPP) liner in the early 2000s.
Recent CCTV inspection of the pipe segment from upstream manhole 7-28-214 to downstream manhole 7-28-216, indicated a potentially significant defect in the liner. Several objects are stuck (including a CCTV camera, a mini pontoon boat and other debris), and the defect appears to have exposed the deteriorated original 69" diameter Reinforced Concrete Pipe that it was supposed to replace.
This defect needs to be evaluated to verify whether it is impacting the structural integrity or hydraulics of the SRO at this point; and the debris needs to be removed to ensure it does not cause surcharge or sanitary sewer overflow of the SRO during a major storm.
Brown and Caldwell, Inc., CA&I services include, but are not limited to: condition assessment, administering the construction schedule; reviewing shop drawings and test results; issuing interpretations and clarifications; certifying contractor progress payments; conducting inspections; and providing post-construction services.
Contract Term
Work under this change order is anticipated to be performed from approval until approximately Feb. 28, 2018.
Financial Impact
Brown and Caldwell, Inc.'s charges for work under this change order will not exceed $300,000, for a new total valuation of the contract not to exceed $909,981, including all sub-consultants and reimbursable costs. Funds are available in the Water Services Department’s Capital Improvement Program budget. Contract payments may be made up to contract limits for all rendered contract services, which may extend past the contract termination.
Concurrence/Previous Council Action
City Council approved contract 137750 in the "not to exceed" amount of $359,987, on Jan. 29, 2014. City Council approved an amendment to contract 137750 by an additional amount of $249,994, on Feb. 1, 2017. This "not to exceed" change order will increase the contract amount further by an additional amount of $300,000, and will be paid under project WS90160102.
Public Outreach
Informational flyers have been distributed to nearby businesses and industries, and face-to-face meetings have also been conducted. There are no residential areas in the immediate vicinity.
Location
2nd Place and Watkins Street
Council District: 8
Department
Responsible Department
This item is submitted by Deputy City Manager Karen Peters and the Water Services Department.