Los Angeles County,
|Owner(s)||Los Angeles County Department of Public Works|
|Dam and spillways|
|Type of dam||Rock-fill|
|Height||147 ft (45 m)|
|Length||2,698 ft (822 m)|
|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)|
|Hydraulic head||135 ft (41 m)|
The dam was built in 1928 by the Los Angeles County Department of Public Works, which continues to operate it.
Puddingstone Dam serves mainly for flood control. It impounds Walnut Creek, a tributary of the San Gabriel River, to form Puddingstone Reservoir, which can hold more than 20,000 acre⋅ft (25,000,000 m3) of water. The reservoir stores floodwater from both the Walnut Creek Wash, and also the San Dimas Wash, to which it is connected by a short artificial channel below San Dimas Dam.
- "Puddingstone". National Performance of Dams Program. Stanford University. Retrieved 2011-11-24.