Upper Stone Canyon
Upper Stone Canyon is an earth dam located in Los Angeles County, California, built in 1954. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Stone Canyon
The primary purpose of Upper Stone Canyon is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Los Angeles Department Of Water And Power (local government). It impounds the Stone Canyon Cr.
The dam stands 111 feet tall and stretches 740 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 425 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 11/04/2025.
At 111 feet, this dam is taller than 98% of all dams in the United States.
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Location
| State | California |
| County | Los Angeles |
| River/Stream | Stone Canyon Cr |
| Coordinates | 34.11900, -118.45580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 111 ft |
| Dam Height | 111 ft |
| Dam Length | 740 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 425 acre-ft |
| Max Storage | 425 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Los Angeles Department of Water and Power |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/04/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00097 |
| Federal ID | CA00097 |
| More Info | State Dam Safety Program |