Whitewater River/Colorado River Aqueduct Siphon Scour and Mine Reclamation Project

5 Documents in Project

Summary

SCH Number
2005071069
Lead Agency
Metropolitan Water District of Southern California
Document Title
Whitewater River/Colorado River Aqueduct Siphon Scour and Mine Reclamation Project
Document Type
NOP - Notice of Preparation
Received
Present Land Use
Various

Document Description
NOTE: Revised Metropolitan is proposing 3 improvements related to its CRA. Two of the improvements would protect siphons from scour effects caused by erosion within the Whitewater River, and potentially at the WMP. The third improvement would prevent over-pressurization of the CRA in the event the San Jacinto Tunnel becomes blocked. The first improvement would include the installation of scour protection devices (i.e., a gabion wall), which would generally involve: (1) the replacement of an existing earthen berm upstream of the CRA siphon with an ~800 ft long, 12 ft wide (at the base), and 9 ft high gabion wall consisting of rock-filled cages; (2) placement of rocks to backfill a 15 ft high erosional feature directly adjacent to the downstream side of the CRA siphon's protective concrete apron; and (3) relocation of soil from the existing earthen berm to behind the newly constructed gabion wall. The second improvement would entail reclamation of the WMP, and would generally involve: (1) borrowing spoil material from the Cabazon Spoil site, created when the CRA was constructed about 70 yrs ago; (2) transporting the spoil material (and minor excess material from the Cabazon Radial Gate site) via haul truck; (3) depositing the material int eh WMP; and (4) revegetating the disturbed areas. The third improvement, at the Cabazon Radial Gate Facility, would generally involve (1) the removal of the radial gate at the San Gorgonio Wasteway; (2) the widening of ~100 ft of the existing concrete lined waste-way channel that conveys water to the San Gorgonio River; and (3) the replacement of the steel radial gate with a 125 ft long reinforced-concrete weir structure.

Contact Information
Marty Meisler, Ph. D.
Metropolitan Water District of Southern California
P.O. Box 54153
Los Angeles, CA 90054

Phone : (213) 217-6364

Location

Coordinates
33°55'27"N 116°38'16"W
Cities
Desert Hot Springs
Counties
Riverside
Cross Streets
I-10/Whitewater Canyon Rd, Esperanza Ave/Orange St./ Carmen Ave/Elm St
Zip
92282/30
Total Acres
110
Parcel #
various
State Highways
I-10
Railways
UPRR
Waterways
Whitewater River, San Gorgonio River
Township
3S
Range
2E
Section
11;20
Base
SBB&M
Other Location Info
Nearest Community: Cabazon

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities Mining (Mine Reclamation)
Local Action
Other Action
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Geologic/Seismic Minerals Noise Public Services Soil Erosion/Compaction/Grading Traffic/Circulation Vegetation Water Quality Land Use Cumulative Effects
Reviewing Agencies
Air Resources Board, Major Industrial Projects California Department of Conservation California Department of Parks and Recreation California Department of Public Health California Department of Transportation, District 8 California Public Utilities Commission California Regional Water Quality Control Board, Colorado River Basin Region 7 California State Lands Commission Colorado River Board Department of Fish and Wildlife, Region 6 Department of Toxic Substances Control Office of Historic Preservation Resources Agency State Water Resources Control Board, Division of Water Rights California Native American Heritage Commission

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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