Cow Palace Lagoon 1 is an earth dam located in Yakima County, Washington, built in 2000. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 1,470 ft long. 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 Cow Palace Lagoon 1
Cow Palace Lagoon 1 is a dam in Yakima, Washington. The dam is owned by Cow Palace, LLC (private). It impounds the Offstream.
The dam stands 23 feet tall and stretches 1,470 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 48 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2000, the structure is 26 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 06/27/2017.
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Location
| State | Washington |
| County | Yakima |
| River/Stream | Offstream |
| Coordinates | 46.40448, -120.13953 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Length | 1,470 ft |
| Year Completed | 2000 (26 years old) |
Storage & Hydraulics
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 7 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Cow Palace, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/27/2017 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA02023 |
| Federal ID | WA02023 |
| More Info | State Dam Safety Program |