Stream Maintenance Program, CEQA and Permitting

The Napa County Flood Control and Water Conservation District (District) conducts maintenance activities to reduce flooding along stream channels on public and private lands throughout Napa County.  The District also responds to citizen and government alerts to potential flooding or erosion problems, and conducts annual creek and river surveys to assess and prioritize maintenance needs. The District’s maintenance area and responsibilities include:

  • Maintenance of the District’s approximate 13 miles of flood control channels and easements,
  • Debris and vegetation management for flood damage reduction and resource protection throughout the county, but particularly within the Napa River and its tributaries, and
  • Erosion protection for river and stream banks.

Horizon Water and Environment (Horizon) is developing a Stream Maintenance Manual (Manual), preparing California Environmental Quality Act (CEQA) compliance documents for the Manual, and obtaining long-term multi-year regulatory permits for the District’s maintenance activities.  The Manual includes maintenance approaches and methodologies for many natural instream conditions including non-native and invasive plant management, woody debris management, bank stabilization, and minor debris and sediment removal.

To comply with CEQA requirements, Horizon is preparing an Initial Study/Mitigated Negative Declaration (IS/MND) following the County’s Local Procedures for Implementing the California Environmental Quality Act (Napa County Conservation, Development & Planning Department.  The CEQA compliance process is anticipated to be completed in 2011.

Horizon is also coordinating programmatic permitting for the District’s stream maintenance program with the California Department of Fish and Game and the San Francisco Bay Regional Water Quality Control Board.