| Samuel B. Morris Dam | |
|---|---|
 Morris Dam viewed from the unofficial overlook on State Route 39 (Spillway on left and dam on right) | |
| Country | United States |
| Location | Los Angeles County, California |
| Coordinates | 34°10′29″N 117°52′52″W / 34.17472°N 117.88111°W |
| Status | Operational |
| Construction began | 1932 |
| Opening date | 1934 |
| Construction cost | $25 million |
| Owner(s) | Los Angeles County Flood Control District |
| Dam and spillways | |
| Type of dam | Concrete gravity |
| Impounds | San Gabriel River |
| Height | 245 ft (75 m)[n 1] |
| Length | 750 ft (230 m) |
| Spillway type | Gated concrete overflow |
| Spillway capacity | 80,000 cu ft/s (2,300 m3/s) |
| Reservoir | |
| Creates | Morris Reservoir |
| Total capacity | 39,300 acre⋅ft (48,500,000 m3) (nominal) 27,800 acre⋅ft (34,300,000 m3) (current) |
| Surface area | 417 acres (169 ha) |
| Normal elevation | 1,152 ft (351 m)[n 2] |
| Power Station | |
| Installed capacity | N/A |
Morris Dam (officially the Samuel B. Morris Dam) is a concrete gravity dam across the San Gabriel River in the U.S. state of California. It impounds Morris Reservoir, directly downstream of San Gabriel Dam.
The dam was built in the 1930s as a water supply facility for the city of Pasadena, but is now mostly utilized for flood control and flow regulation for groundwater recharge. Situated in northern Los Angeles County, the dam impounds the 417-acre (169 ha) Morris Reservoir in the Angeles National Forest, a few miles northeast of Azusa. From the 1940s to the 1990s, the reservoir was also used for underwater missile testing by the United States military.
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