J. W. Wisda
J. W. Wisda is an earth dam located in Los Angeles County, California, built in 1958. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About J. W. Wisda
The primary purpose of J. W. Wisda is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by California Department Of Parks And Recreation (state). It impounds the Tr Topanga Can.
The dam stands 50 feet tall and stretches 350 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 45 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1958, 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 05/19/2025.
At 50 feet, this dam is taller than 93% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | Los Angeles |
| River/Stream | Tr Topanga Can |
| Coordinates | 34.09340, -118.59290 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 350 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 45 acre-ft |
| Max Storage | 45 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | California Department of Parks and Recreation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/19/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00053 |
| Federal ID | CA00053 |
| More Info | State Dam Safety Program |