Shadowbrook Lift Station and Force Main Project (Lake or Streambed Alteration Agreement No. 1600-2016-0112-R2)

Shadowbrook Lift Station and Force Main Project (Lake or Streambed Alteration Agreement No. 1600-2016-0112-R2)

CDFW has executed Lake and Streambed Alteration Agreement No. 1600-2016-0112-R2, pursuant to section 1602 of the Fish and Game Code to the project Applicant, the City of Roseville as represented by Ed Winston. The project is limited to the rehabilitation of the existing Shadowbrook Lift Station to improve its resiliency to sewer system overflows. The rehabilitation of the existing Shadowbrook Lift Station would be constructed in two phases (Phase 1 and 2). Phase 1 is not covered by the Agreement. Phase 2 consists of construction of the proposed dual six-inch force mains and would require a clearwater diversion to temporarily de-water a segment of Dry Creek and divert flows through the project area. The project would involve installation of a new fiberglass wet well within the existing pump station steel wet well, thereby occupying the same footprint. The new wet well would extend to a point approx. one foot above the 100-year floodplain. The existing masonry enclosure surrounding the pump station would be partially reconfigured to raise the concrete working pad to match the new top of wet well elevation; the existing lift station masonry block walls would also be extended vertically to retain the present eight-foot distance above grade. The footprint for the concrete pad would also be extended to provide a secured area for a permanently mounted on-site standby generator. The expansion area would be immediately adjacent to the existing lift station facility and overlay an area which is currently occupied by a concrete pad. The reconstructed lift station would cover an area of approx. 4,000 sq. ft., which is larger than the existing facility. Additionally, the proposed project includes installation of new dual six-inch force mains to connect from the lift station to the existing 63-inch Dry Creek interceptor sewer line located on the west side of the creek. The purpose of the second force main is to provide system redundancy rather than capacity for future sewage flows (sewer shed is built out). The new dual force mains would be approx. 370 feet in length and would consist of ductile iron pipe with ceramic epoxy lining.

Roseville

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