Castaic Dam Piezometer Installation Project

Summary

SCH Number
2020080125
Lead Agency
Water Resources, Department of (California Department of Water Resources)
Document Title
Castaic Dam Piezometer Installation Project
Document Type
NOE - Notice of Exemption
Received
Posted
8/10/2020
Project Applicant
California Department of Water Resources

Document Description
The proposed project includes the installation of piezometers and an inclinometer at six different locations on the left abutment of the Castaic Dam. This is proposed after an Engineering Report prepared on December 31, 2018 presented a stability analysis for the left abutment of the Castaic Dam and identified data gaps in the piezometric data. DWR concluded that the left abutment is stable but piezometric surfaces appear lower than assumed in previous stability analyses. As a result, the proposed project will address the need for more precise data of the hydrogeological setting at Castaic Dam’s left abutment. (See Attachment A)

Contact Information
Gina Radieve
California Department of Water Resources
1416 9th Street
Sacramento, CA 95814

Phone : (916) 712-6873

Location

Cities
Castaic
Counties
Los Angeles
Other Location Info
The project is located in the Castaic Lake State Recreation Area in Castaic, CA. The work will occur on the left abutment (the esatern side) of the Castaic Lake Dam (see Exhibit A).

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15306
Reasons for Exemption
The proposed project involves collection of exploratory information to address the need for more precise data of the hydrogeological setting at Castaic Dam’s left abutment. The exploratory work will provide an accurate capture of differences in piezometric pressure between areas in geologic formations that are considered critical to the dam’s left abutment stability. The project would not result in any serious or major disturbance to an environmental resources.

Attachments

Notice of Exemption
2020080125_Castaic Dam Piezometer Installation Project   PDF 1720 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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