San Andreas
Dam in San Mateo County, California · San Andreas Creek · forms San Andreas Lake A Dam
Height
107 ft
33 m (NID height)
Length
727 ft
222 m
Completed
1870
San Andreas Lake A Dam today
444.16 ft
7 days ▼ 0.05 ft
Reservoir level measured Oct 23, 2026, 9:45 AM PDT. Full level page →
Facts
- Purposes
- Water Supply
- Dam type
- Earth
- Owner
- City and County of San Francisco (Local Government)
- Maximum storage
- 19,027 acre-ft
- Surface area
- 550 acres
- Hydraulic height
- 97 ft
- Drainage area
- 4 sq mi
- Army Corps district
- San Francisco District
- NID ID
- CA00129
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID CA00129 at nid.sec.usace.army.mil. Project website.