Double Diamond Dam
Double Diamond Dam is an earth dam located in Washoe County, Nevada, built in 1995. It carries a Significant hazard potential classification and has a poor condition assessment.
About Double Diamond Dam
The primary purpose of Double Diamond Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by South Meadows Association (private). It impounds the Steamboat Creek-os near Reno.
The dam stands 15 feet tall and stretches 3,200 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 280 acre-feet, and collects water from a drainage area of 40 square miles. Completed in 1995, the structure is 31 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 05/09/2023.
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Location
| State | Nevada |
| County | Washoe |
| Nearest City | Reno |
| River/Stream | Steamboat Creek-os |
| Coordinates | 39.45740, -119.73510 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 12 ft |
| Dam Length | 3,200 ft |
| Year Completed | 1995 (31 years old) |
Storage & Hydraulics
| NID Storage | 280 acre-ft |
| Max Storage | 280 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 40 sq mi |
| Max Discharge | 10,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | SOUTH MEADOWS ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/09/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NV10368 |
| Federal ID | NV10368 |
| More Info | State Dam Safety Program |