Lakebed Management is responsible for maintaining the public trust lands below the high-water mark in Clear Lake in accordance with Lake County Code, Chapter 23, the Shoreline Ordinance, and Chapter 639 in the State Statutes of 1973. Its purpose is to improve and protect the public's interest in the waters and the bed of the waters in and around Clear Lake, and to ensure that the lands will be used for general statewide interests in the furtherance of commerce, navigation, fishery, recreation, and, wherever possible and appropriate, preservation of the land and waters in their natural state by establishing minimum standards for the construction, alteration, removal, and maintenance of structures or other prescribed activities in the lake.
The lake bottom lakeward of Zero Rumsey (low-water mark) is land held in the public trust by the State of California for the people of the State, while the land between Zero and 7.79 feet Rumsey (high-water mark) are private, but overlaid with a public trust easement. Lakebed Management processes permits and encroachment leases for all structures lakeward of 7.79 feet Rumsey, maintains navigation aides, swim markers, and swim areas; performs water quality monitoring; and provides support to the Sheriff's Department, Department of Fish and Wildlife, Corps of Engineers, and the State Lands Commission.
In 2010, the Clear Lake Integrated Watershed Management Plan (CLIWMP) was completed. The goal of the CLIWMP is to plan and work toward an environmentally and economically healthy watershed that benefits the community and is sustainable for future generations. The CLIWMP provides background on existing lake and watershed conditions and management and identifies opportunities to improve watershed conditions and provides guidance for continuing watershed planning efforts.