Project Details
Title: Issuance of a Permit to the Cachuma Operation and Maintenance Board for Modification to Four Air Vacuum/Air Release Valves along the South Coast Conduit
Summary: In 2012, the Bureau of Reclamation (Reclamation) performed an inspection of the South Coast Conduit, a component of the Cachuma Project. Four Air Vacuum/Air Release (AV/AR) valves along the South Coast Conduit (see Figure 1) were deemed non-compliant with the California Code of Regulations Title 22, Chapter 16, ? 64576. The four AV/AR valves need to be modified in order to meet these regulations. Reclamation will issue an MP620 permit (Mid-Pacific Region specific permit for addition or alterations to federal facilities) to the Cachuma Operation and Maintenance Board (COMB), its operating entity for the South Coast Conduit, to modify the four AV/AR valves to meet the requirements of California Code of Regulations Title 22, Chapter 16, ? 64576. Modifications would include installing drains at each of the four structures. The drains would be installed immediately downhill of each valve (to the south at Station 199+63, east at Station 225+98, south at Station 230+51, and southwest at Station 900+15), and would prevent the valves from being exposed to run-off and rainwater. A schematic of the proposed drain is shown in Figure 2. Installation of the drains would require hand excavating a 1-foot wide, 5-feet long, and 2-feet deep trench at each site and installing a 4-inch drain and 18-inch square by 12-inch deep gravel infiltration field. A total of 1.7 cubic yards would be excavated from for all four sites and would be used for backfill at each respective site. Areas of excavation are within the previously disturbed areas created when the AV/AR valves were originally installed. No water would be discharged from the valves for this action. Rainwater and run-off from the new drains would percolate into the infiltration fields, and would not enter any nearby creeks.
Contact
Phone
Fax
E-Mail
Notes
Rain Emerson 559-262-0335 N/A remerson@usbr.gov
Status
05/21/2015Categorically Excluded May 2015
List of Available Reports
File Report Title File Ext File Size
Issuance of a Permit to the Cachuma Operation and Maintenance Board for Modification to Four Air Vacuum/Air Release Valves along the South Coast Conduit. .pdf 895 B