Mokelumne Watershed Routine Maintenance Project

Project location:

EBMUD’s Mokelumne Watershed (Watershed) property borders and includes Camanche and Pardee Dams and Reservoirs, extending from less than 50 feet (15 m) to about 3 miles (4.8 km) from the high-water surface elevation of Camanche and Pardee Reservoirs. It also includes the lands adjacent to the lower Mokelumne River for approximately one-half mile (0.8 km) below Camanche Dam. Current and recent land use practices in the Mokelumne Watershed include management for water supply, flood control, grazing, aquaculture, hydroelectric power, wastewater treatment, wildland fire prevention and suppression, facility maintenance, residential use, and recreation.

Project details:

The Mokelumne Watershed Routine Maintenance Project (Project) involves the continuation of routine maintenance of the Mokelumne Watershed facilities, roads, and infrastructure at locations within the Watershed property. Many of these activities were previously authorized under Fish and Game Code Section 1602 Lake and Stream Alteration Agreements (LSAAs) with the California Department of Fish and Wildlife (CDFW). Given the expiration of the prior LSAA, the EBMUD seeks a new LSAA for the continuation of routine maintenance activities critical to Watershed operations in 1600 jurisdictional areas and that comprise the Project, permitting the continuation of routine maintenance activities critical to Watershed operations.

To permit ongoing environmental stewardship activities that are part of the Project, EBMUD also seeks a Safe Harbor Agreement with CDFW covering effects to foothill yellow-legged frog (Rana boylii), California tiger salamander (Ambystoma californiense), as well as other species that may be listed under the California Endangered Species Act in the near future such as western spadefoot (Spea hammondii) and tricolored blackbird (Agelaius tricolor). Maintenance activities include sediment and debris removal; vegetation management; facilities maintenance; erosion prevention, control, repair, and protection; and environmental stewardship activities. Routine maintenance activities are critical to operations of the Mokelumne Watershed, providing for safe travel throughout the Project area while ensuring natural flows for drainages, flood control infrastructure, dam seepage monitoring wells and weirs, and other watercourses.

The routine maintenance of facilities, roads, and infrastructure is ongoing due to changing conditions resulting from weather events, deterioration of facilities and structures, and normal use.

Schedule:

Complete Initial Environmental Review: July 2021

Public Review of MND: August 11–September 10, 2021

EBMUD Board of Directors to consider adoption of Final MND: October 12, 2021

Begin Maintenance Work: April 2022

Published Studies and Other Resources