Ventura River Emergency Water Facility Repairs and Streambed Alteration

Ventura River Emergency Water Facility Repairs and Streambed Alteration

The Operator will alter the streambed to repair several facilities, located on the Ventura River, at Foster Park. The structures are all part of the potable water system for Ventura County. 1) Sand trap flush line: This area is on the east bank, where the line will be exposed with an excavator, near the toe of the bank, out of the flow line. The sand which is flushed from the line shall be removed. This will be done when the area is dry. 2) Pipeline between Nye Wells 7 and 8: This repair will be outside the banks, but may impact native riparian vegetation. the right of way has not been completed with the land owner. 3) Nye Well 8 protection: Additional launchable granite rock rip-rap, up to 30 rocks, three to five tons each, would be placed around the well head, and on the bank, for an area of 0.03 acre or 1000 square feet. 4) Removal of debris form the river channel: Sections of pipeline which have become separated, and granite boulders that were part of the rip-rap will be removed when the area is dry. the wel casing for Nye Well 1A wil be removed once the wellhead is removed. 5) Intake structure access route: Vehicles may slowly drive across the low flow to the intake structure when repairs are needed. Small boulders may be removed with a back hoe to allow access when the area is dry. 6) Nye Well 2 pipeline repair: The installation of 400 linear feet of 8 inch restained joint PVC pipe, buried at a depth of 2 to 4 feet. The area should be dry. 7) Monitoring Wells 5 and 10: The wells were damaged in the storm. When the area is dry, a utility truck will access the two wells and the bent portion will be cut with an acetylene torch and anew section welded on. 8) A 36 inch gravity line and manholes repair: When the area is dry, the manholes will be demolished with jackhammers and a backhoe, and a concrete cap will be installed over the remaining structure. the pipeline will be repaired. 9) River crossing pipeline: Storms damaged 900 feet of pipeline crossing the river. a slip lining and bursting procedure is proposed, in which a 14 inch HDPE pipe will be inserted into the existing 16 inch concrete pipe. The process includes dewatering the pits, and backfilling. Excavation is required and the water flow shall be diverted. Temporary imnpacts to vegetation will be 0.25 acre and permanent impacts will be 0.02 acre.

Ventura