Lake Tahoe Dam Concrete Condition Field Investigation
Summary
SCH Number
2024100554
Public Agency
California Regional Water Quality Control Board, Lahontan South Lake Tahoe Region 6
(RWQCB)
Document Title
Lake Tahoe Dam Concrete Condition Field Investigation
Document Type
NOE - Notice of Exemption
Received
Posted
10/14/2024
Document Description
The project is being undertaken to evaluate the condition of the concrete in Lake Tahoe Dam in support of the U.S. Department of Interior, Bureau of Reclamation’s Lake Tahoe Dam Rehabilitation Feasibility Study. The purpose of collecting and testing concrete core samples from the existing dam is to inform decisions related to the current and projected materials properties of the dam’s structural features. Petrographic examinations of the concrete cores will provide insights into the nature and extent of deterioration being experienced by the concrete from routine freeze-thaw cycles due to high fluctuations in daily temperatures. Concrete strength tests will provide information on current material properties for use in structural analyses. Comparison of current materials properties to those measured during earlier concrete testing of samples extracted in 2003 will provide data on potential time dependent changes in material properties to inform structural analyses of future conditions.
Contact Information
Name
Kathleen Bindl
Agency Name
Lahontan Regional Water Quality Control Board
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Tahoe City
Counties
Placer
Regions
Northern California
Cross Streets
Lake Tahoe Dam
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301 Existing Facilities
Reasons for Exemption
This project will be surveying the Lake Tahoe Dam by collecting 21 concrete core samples including two samples from locations below the OHWM on the Truckee River. There are no significant impacts expected from this project and best management practices are required during project implementation.
County Clerk
Placer