Mariposa Dam
Dam in Mariposa County, California · Mariposa Creek · forms Mariposa Reservoir
Height
88 ft
27 m (NID height)
Length
1,330 ft
405 m
Completed
1948
Mariposa Reservoir today
365.17 ft
7 days ▼ 0.18 ft
Normal storage
4,300 acre-ft
Reservoir level measured Oct 23, 2026, 11:00 AM PDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Hydroelectric
- Dam type
- Earth
- Structural height
- 88 ft
- Owner
- USACE - Sacramento District (Federal)
- Maximum storage
- 21,500 acre-ft
- Surface area
- 510 acres
- Hydraulic height
- 83 ft
- Drainage area
- 107 sq mi
- Spillway
- Uncontrolled, 260 ft wide
- Army Corps district
- Sacramento District
- Also known as
- Mariposa Reservoir
- NID ID
- CA10107
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Sep 15, 2026. Search NID ID CA10107 at nid.sec.usace.army.mil. Project website.