DWR's Crafton Hills Reservoir Dam Repair Grouting Project for 2016
DWR's Crafton Hills Reservoir Dam Repair Grouting Project for 2016
Summary
SCH Number
2016118391
Lead Agency
Water Resources, Department of
(California Department of Water Resources)
Document Title
DWR's Crafton Hills Reservoir Dam Repair Grouting Project for 2016
Document Type
NOE - Notice of Exemption
Received
Document Description
The purpose of this project is to remediate the seepage that has been observed downstream of the original Crafton Hills Reservoir Dam. This work will consist of drilling and grouting up to 24 holes along the CHR Dam Access road. The holes will be drilled through the asphalt road to a depth of 100 feet using a rubber tracked drill rig. The holes will be grouted using high-mobility-grout under low pressures to fill the voids in the rock formation. Grout injection will continue until the established refusal criteria are met. Wells downstream of the grouting location will be monitored continuously during grouting for pH or turbidity changes. The work is expected to last three weeks, with mobilization starting 11/28/16. This project will not have any potentially significant adverse environmental impacts.
This project is categorically exempt under CEQA, Class 1(m), as a minor repair to an existing dam under the supervision of the Department of Water Resources.
