Grant Lake Outlet Valve Replacement Geotechnical Survey (Notification of Lake or Streambed Alteration, No. EPIMS-MOO-66741-R6)

The California Department of Fish and Wildlife has authorized the Los Angeles Department of Water and Power to conduct geotechnical surveys at 14 locations near Grant Lake under Lake and Streambed Alteration Agreement EPIMS-MOO-66741-R6, in compliance with Section 1602 of the Fish and Game Code. The work involves sonic drilling to a maximum depth of 110 feet across all sites, with three of the borings directly impacting the lake or its shoreline below the high-water mark. Two of these will be conducted from a barge or watercraft within the lake itself, while the third may be performed on the shoreline depending on seasonal water levels. Each borehole is confined to an impact area of no more than two square feet and will be meticulously backfilled using bentonite chips slowly introduced through the 6-inch casing to minimize environmental disturbance. The project requires specialized equipment including a crane, sonic drilling rig, 10-wheel truck, support vehicles, forklift, equipment trailer, and watercraft. The activity is part of preparatory work for the Grant Lake Outlet Valve Replacement project, with geotechnical data collected to inform future infrastructure design. All fieldwork is subject to conditions designed to protect aquatic resources, and operations will be executed to avoid unnecessary disruption to the lakebed and surrounding habitat. The authorization is issued by Region 6 of the California Department of Fish and Wildlife, and project coordination is managed through designated contacts at both LADWP and CDFW. No public solicitation or set-aside classifications are associated with this agreement, as it is a regulatory authorization for a specific technical survey rather than a procurement. The notification was posted on August 7, 2026, and is accessible through the CEQA Net portal.