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Performance Report

San Lorenzo River Sediment TMDL


Problem Statement - The natural processes of erosion and sedimentation in the San Lorenzo River Watershed have been accelerated due to anthropogenic watershed disturbances. Studies conducted by various authors have concluded that erosion rates were two to four times natural rates. These studies have also documented and quantified the decline in anadromous fisheries and the quality of fish habitat. Excessive sedimentation has interfered with the beneficial uses of these waterbodies including, Fish and Wildlife (RARE, MIGR, SPWN, WILD).
Map of the project area

Status and Public Notices

Status: fully approved and effective.
Public Notice: none at this time.

Approval status

Central Coast Water Board - approved May 16, 2003.
State Water Resources Control Board - approved September 16, 2003.
Office of Administrative Law (OAL) - approved December 18, 2003, which is the effective date.
US Environmental Protection Agency - approved February 19, 2004.


  • February 19, 2004 - USEPA approves the San Lorenzo River Sediment TMDL
  • December 18, 2003 - OAL approves the San Lorenzo River Sediment TMDL
  • September 16, 2003 - State Board approves the San Lorenzo River Sediment TMDL
  • May 16, 2003- Central Coast Water Board approves the San Lorenzo River Sediment TMDL

For Additional Information

Please contact Jennifer Epp at 805-594-6181 or by email at Jennifer.Epp@waterboards.ca.gov