Agenda Date: 07/16/2024
Subject:
Title
Resolution 81-2024: Approving a construction contract between the City of Littleton and Inliner Solutions LLC for the 2024 Sanitary Sewer Interceptor Rehabilitation Project
Body
From:
James L. Becklenberg, City Manager
Prepared by:
Carolyn Roan, Project Manager, Public Works
Presentations:
Brent Soderlin, Interim Public Works Director
PURPOSE:
Does council support a construction contract with Inliner Solutions LLC for $2.9 million in order to rehabilitate the remaining segments of the city's sewer interceptor pipe?
LONG-TERM OUTCOME(S) SERVED:
Sustainable Community with Natural Beauty; High-Quality Governance
DISCUSSION:
Much of the sewer interceptor pipe is constructed of concrete, which deteriorates over time in the corrosive environment of wastewater and associated gases. This is typical of sewers worldwide. Without rehabilitation, the sewer would develop holes, break and/or collapse, leading to health risk associated with sewer wastewater in the subsurface soil and groundwater of the South Platte River (which is an environmental violation), and possible sinkholes at the ground surface (often in roadways), both of which are very impactful and expensive to remedy. The industry standard practice is to proactively rehabilitate such pipes with a liner that can be inserted into the existing pipe, as opposed to digging and replacing the pipe, which is both more expensive and more impactful.
BACKGROUND:
The original sewer interceptor pipe in the city was constructed in 1959 within Santa Fe Drive, from the Lee Gulch trunkline extending north to the former wastewater treatment plant located near Santa Fe Dr and Belleview Avenue. In 1976, the interceptor was extended with a larger pipe (diameter range from 54" to 66") to accommodate additional flows from surrounding sanitation districts, and this pipe led to a new wastewater plant (now called South Platte Renew), and the old wastewater plant was dismantled. Some s...
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