RESERVOIR LEVELS
December 21, 2024
723 ft 37.96, -122.61


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Bon Tempe, also known as Bon Tempe Lake, is a vital water resource located in Marin, California, near Pt Reyes Station. Built in 1949 for flood risk reduction and water supply purposes, this Earth-type dam stands at a height of 98 feet, with a hydraulic height of 94 feet, and a length of 1150 feet. With a storage capacity of 4300 acre-feet and a surface area of 140 acres, this dam plays a crucial role in managing the water supply in the region.

Managed by the Public Utility, Bon Tempe is under the jurisdiction of the California Department of Water Resources for safety regulations, permitting, inspection, and enforcement. The dam, which impounds water from Lagunitas Creek, has a high hazard potential but is currently in satisfactory condition as per the last assessment in September 2017. With regular inspections and emergency action plans in place, Bon Tempe ensures the safety of the surrounding community and helps mitigate flood risks in the area.

The dam's location near a major water source and its significant storage capacity make it a key player in water resource management in the region. With Congressman Jared Huffman representing the area, Bon Tempe continues to be a critical infrastructure for flood risk reduction and maintaining a stable water supply for the residents of Marin County. Its historical significance, coupled with its modern safety measures, positions Bon Tempe as a resilient asset in the face of climate change and water resource challenges.

Storage 24hr Change None%
Percent of Normal None%
Minimum 3,235 acre-ft
2023-10-08
Maximum 4,017 acre-ft
2021-10-24
Average acre-ft
Dam_Height 98
Hydraulic_Height 94
Drainage_Area 2.71
Year_Completed 1949
Nid_Storage 4300
Primary_Dam_Type Earth
Surface_Area 140
Hazard_Potential High
River_Or_Stream Lagunitas Creek
Dam_Length 1150
Nid_Height 98
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