Boaters may notice lower water levels at the Thermalito Afterbay through the end of June as the California Department of Water Resources (DWR) works to support an endangered bird species. The Western Snowy Plover is a threatened shorebird that is native to Northern California. The species has been endangered since 1993, according to the U.S. Fish and Wildlife Service. Shallow water can be a hazard to boaters and jet skiers. DWR said the shallow-water hazard is located in a corner of the Thermalito Afterbay near the intersection of East Hamilton Road and Highway 99. A hazard buoy will be placed in the area to alert boaters to shallow water.