Sidehill Detention Basin Dam
Sidehill Detention Basin Dam is an earth dam located in Washoe County, Nevada, built in 1998. It carries a Significant hazard potential classification and has a poor condition assessment.
About Sidehill Detention Basin Dam
The primary purpose of Sidehill Detention Basin 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 Washoe County (local government). It impounds the Sun Valley Creek-tr near Sparks.
The dam stands 14 feet tall and stretches 200 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 71 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1998, the structure is 28 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 06/28/2021.
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 | Sparks |
| River/Stream | Sun Valley Creek-tr |
| Coordinates | 39.59830, -119.78110 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 200 ft |
| Year Completed | 1998 (28 years old) |
Storage & Hydraulics
| NID Storage | 71 acre-ft |
| Max Storage | 71 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 433 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | WASHOE COUNTY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 06/28/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NV10509 |
| Federal ID | NV10509 |
| More Info | State Dam Safety Program |