Den Hoed Dam No 1
Den Hoed Dam No 1 is an earth dam located in Yakima County, Washington, built in 1999. It carries a High hazard potential classification and has a poor condition assessment.
About Den Hoed Dam No 1
The primary purpose of Den Hoed Dam No 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Sunnyside South Ranch Llc (private). It impounds the Sulphur Creek near Sunnyside.
The dam stands 12 feet tall and stretches 920 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 12 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1999, the structure is 27 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. 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 09/29/2021.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Washington dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Yakima |
| Nearest City | Sunnyside |
| River/Stream | Sulphur Creek |
| Coordinates | 46.37555, -119.96410 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Length | 920 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 12 acre-ft |
| Max Storage | 12 acre-ft |
| Normal Storage | 9 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Sunnyside South Ranch LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 09/29/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA01948 |
| Federal ID | WA01948 |
| More Info | State Dam Safety Program |