Clear Lake Information

• Quick link to Clear Lake Level Reading, CDEC
• Clear Lake Level Data
• Clear Lake Summer Levels 
• Clear Lake Winter Levels
• Clear Lake Dam Flows
• How Yolo Flood Control and Water Conservation District Obtained Claim to Waters of Clear Lake
• History of Clear Lake
• Clear Lake is Unique
• Aquatic Plants in Clear Lake
• Algae in Clear Lake

              

What is Rumsey?

The natural level of Clear Lake has been maintained by the Grigsby Riffle, which is a rock sill located at the confluence of Cache and Seigler Creeks near Lower Lake. The natural low water level of Clear Lake was established as "Zero Rumsey" and all subsequent lake measurements are based on this elevation.
Zero Rumsey is equivalent to 1318.256 feet (1929 NGVD).

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This file last updated August 23, 2010