Bole Creek Storm Water Improvement Project (Streambed Alteration Agreement No. EPIMS-SIS-49004R1I

Bole Creek Storm Water Improvement Project (Streambed Alteration Agreement No. EPIMS-SIS-49004R1I

The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement ([EPIMS-SIS-49004-R1I]), pursuant to Fish and Game Code section 1602, the project Applicant, Chris Davis, City of Weed. The project is limited to replacing an existing undersized concrete-lined channel with a new 8-foot by 5-foot concrete box culvert from Rippon Way to the east side of Main Street. The new box culvert would be approximately 170 feet long and would be installed parallel to and on the northern side of the existing concrete-lined channel; this would keep water flowing during construction and minimize impacts to buildings adjacent to the existing channel. The box culvert would tie into an existing concrete arch culvert that flows under Main Street via a concrete transition structure. A new concrete headwall, approach, and riprap side walls would be provided at the inlet to transition the natural stream channel into the box culvert. Riprap would also be installed at the Main Street culvert outlet to prevent erosion. An existing sewer utility pipe as well as concrete retaining walls and road surface would be removed and replaced within Rippon Way to accommodate installation of the headwall and box culvert. The new box culvert would be installed primarily within an existing paved parking lot; paved areas disturbed during construction would be re-paved following completion of the improvements. The maximum depth of excavation would be ~6 feet along the box culvert and ~14 fee for replacement of the sewer main. The box culvert will be installed in dry conditions, work at the headwall and tying the new box culvert into the existing Main Street arch culvert will require a diversion. Dewatering procedures would be determined by the contractor. It is anticipated that dewatering would involve construction of coffer dams that would allow work to be conducted on one side of the stream at a time while water freely flows on the other; alternatively, piping/pumping may be used to divert the water around the work area. Access to the work areas would be from paved public roads. Temporary staging of construction materials and equipment would occur within the project study area.

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