| Puddingstone Dam | |
|---|---|
  Location of Puddingstone Dam in California | |
| Country | United States |
| Location | San Dimas, Los Angeles County, California |
| Coordinates | 34°05′25″N 117°48′33″W / 34.09028°N 117.80917°W |
| Construction began | 1925 |
| Opening date | 1928 |
| Owner(s) | Los Angeles County Department of Public Works |
| Dam and spillways | |
| Type of dam | Rock-fill |
| Impounds | Walnut Creek |
| Height | 147 ft (45 m) |
| Length | 2,698 ft (822 m) |
| Spillways | Overflow |
| Reservoir | |
| Creates | Puddingstone Reservoir |
| Total capacity | 22,232 acre⋅ft (27,423,000 m3) |
| Active capacity | 16,342 acre⋅ft (20,158,000 m3) |
| Catchment area | 33.1 sq mi (86 km2) |
| Surface area | 490 acres (200 ha) |
| Power Station | |
| Hydraulic head | 135 ft (41 m) |
Puddingstone Dam is a 147 ft (45 m) high earth and rockfill dam in the San Gabriel Valley, within San Dimas in eastern Los Angeles County, California.
The dam was built in 1928 by the Los Angeles County Department of Public Works, which continues to operate it.