Regional Water Quality Control Board, Region 2 (San Francisco Bay), Oakland
...Lagunitas Creek watershed and an implementation plan to achieve the TMDL and related habitat enhancement goals
NOD - Notice of Determination
The Basin Plan amendment incorporates a sediment TMDL to restore properly functioning streambed substrate conditions and also a related plan to enhance stream-riparian habitat complexity and connectivity in the Lagunitas Creek watershed. Control actions are focused on sediment discharges from unpaved and paved roads and actions to control channel incision via construction of engineered log jams and reconnection of the channel to its floodplain (in channel reaches bordered by State and federal parklands).
Lagunitas Creek provides essential habitat for federally-listed endangered coho salmon, steelhead trout, and California freshwater shrimp, and notably the largest population of coho salmon south of Mendocino County. Besides loss of habitat due to dams, the most significant cause for coho salmon and steelhead population declines is channel incision. Channel incision reduces the frequency of gravel bars and pools, side channels, and alcoves, and results in disconnection of the channel from its floodplain. Channel incision also is the largest source of sediment to the watershed.
(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA
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