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Sewer Lift Station Projects

How the sewer works

TUD’s wastewater collection system conveys wastewater and solids from a customer’s home or business to a wastewater treatment plant.  In most cases, the wastewater collection system conveys wastewater by gravity utilizing the natural slope of the land.  Many areas in Tuolumne County require a lift station which is used to pump wastewater out of low-lying areas where gravity flow is not possible. TUD owns and operates several sewer lift stations that are aged and in need of replacement.

Mono Village Lift Station Bypass 

The Mono Village lift station serves approximately 175 residential and commercial service connections. The facility consists of single concrete vault structure covered by a deteriorated wood structure. The facility is located along the shoulder and into a cut bank on the side of Mono Way. There is no designated parking for staff to service the facility and the building, sumps, pumps, and equipment have reached the end of their useful lives. The existing sumps, covers, and building pose high safety risk to personnel and to the public. The existing pumps are extremely difficult to remove, and maintenance complicated. Replacing the station on the existing site is not feasible and potential sites for relocation are limited. Staff have determined the preferred alternative is to abandon the lift station by constructing a new gravity sewer main.  Easements have been obtained and engineering design is complete to construct 2,100 linear feet of new 8” gravity sewer main in Mono Way from Hillsdale Dr. to Edgemont Acres Drive. Reconfigure manholes in the Mono Village Parking Lot and demolish the old lift station.

Willow Springs Lift Station  

The Willow Springs Lift Station building, sumps, pumps, and equipment have reached the end of their useful life and must be replaced. The facility no longer meets the District’s safety and operation standards. The existing trash screen plugs up frequently and requires almost daily maintenance causing inefficient use of staff time. Replacing the station on the existing site is not possible without first building a temporary lift station for use during construction. The adjacent landowner has transferred ownership to the District to provide space to build a new lift station.  This project involves building a new lift station on the recently acquired adjacent parcel, including a primary and secondaryoverflow sump.

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