California Code of Regulations › Title 23 - Waters › Division 4 - Regional Water Quality Control Boards › Chapter 1 - Water Quality Control Plans, Policies, and Guidelines › Article 3 - Central Coast Region › Section 3927 - A Total Maximum Daily Load and Implementation Plan for Sediment in the San Lorenzo River, Including Carbonera Creek, Lompico Creek, and Shingle MILL Creek

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Regional Board Resolution No. R-3-2002-0063, adopted on May
					 16, 2003 by the Central Coast Regional Water Quality Control Board (Regional
					 Board), modified the regulatory provisions of the Water Quality Control Plan
					 for the Central Coast Region (Basin Plan) by establishing Total Maximum Daily
					 Loads (TMDLs) for Sediment in the San Lorenzo River, including Carbonera Creek,
					 Lompico Creek, and Shingle Mill Creek, adopting numeric targets for sediment,
					 and adopting an implementation plan to achieve the TMDLs.
This Basin Plan amendment establishes the TMDL for sediment
					 in the San Lorenzo River at 306,139 tons/year; in Carbonera Creek at 11,728
					 tons/year; in Lompico Creek at 9,542 tons/year; and in Shingle Mill Creek at
					 857 tons/year. An implicit margin of safety was incorporated into the TMDLs
					 through the use of conservative assumptions throughout the sediment source
					 analysis and characterization of beneficial use impacts. The Regional Board
					 also allocated the TMDLs, based on achievable reductions in sediment loading of
					 up to 27 percent of current loads, to the major land use categories in the
					 watershed. Through this Basin Plan amendment, the Regional Board adopted
					 numeric targets for streambed sediment characteristics known to be supportive
					 of the beneficial uses protecting anadromous fish. These numeric targets
					 interpret narrative water quality objectives for sediment in the Basin Plan.
					 The Regional Board will evaluate the TMDLs by monitoring numeric targets and
					 tracking implementation actions. Implementation emphasizes the role of the
					 Santo Cruz County Departments of Planning and Public Works, the Santa Cruz
					 County Resource Conservation District, and other public and private groups to
					 implement self-determined activities identified in the amendment language. By
					 the end of the first year of implementation, the Regional Board and the
					 implementing parties will establish a time schedule for completion of trackable
					 implementation actions identified in the amendment language, or, staff will
					 develop the schedule and present it to the Regional Board as a Basin Plan
					 amendment. If, in future years, self-determined actions have not been
					 completed, staff will develop a regulatory approach (rather than a
					 self-determined approach) and present a revised implementation plan to the
					 Regional Board as a Basin Plan amendment. The Regional Board scheduled a
					 25-year implementation period to achieve the TMDL. Revision of the TMDL, the
					 numeric targets, or the implementation strategy would be considered through the
					 Basin Plan amendment process.
1. New
					 section summarizing regulatory provisions of Basin Plan amendment filed
					 12-18-2003; operative 12-18-2003. Basin Plan amendment adopted by the Central
					 Coast Regional Water Quality Control Board pursuant to Resolution No.
					 R3-2002-063 on 5-16-2003; Resolution No. 2003-0061, approving the amendment to
					 the Basin Plan, adopted by the State Water Resources Control Board on
					 9-16-2003. Approved by OAL 12-18-2003 pursuant to Government Code section
					 11353
					 (Register 2003, No. 51).