Captain Johnson Reservoir Dam is an earth dam located in Washoe County, Nevada, built in 1911. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 120 ft long, taller than 80% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Captain Johnson Reservoir Dam
The primary purpose of Captain Johnson Reservoir Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Usdi Bureau of Land Management (federal). It impounds the Denio Creek.
The dam stands 35 feet tall and stretches 120 feet across, creates a reservoir covering 190 acres, has a maximum storage capacity of 1,250 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1911, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/16/2022.
At 35 feet, this dam is taller than 80% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nevada |
| County | Washoe |
| Nearest City | None |
| River/Stream | Denio Creek |
| Coordinates | 41.59917, -119.72775 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 120 ft |
| Year Completed | 1911 (115 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 190 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Usdi Bureau of Land Management |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/16/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NV00010 |
| Federal ID | NV00010 |
| More Info | State Dam Safety Program |