Whitestone Lake Dam
Whitestone Lake Dam is a rockfill dam located in Okanogan County, Washington, built in 1930. It carries a Low hazard potential classification.
About Whitestone Lake Dam
The primary purpose of Whitestone Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Whitestone Mounatin Orchard Inc. (private). It impounds the Tr-okanogan River near Tonasket.
The dam stands 9 feet tall and stretches 375 feet across, creates a reservoir covering 192 acres, has a maximum storage capacity of 2,720 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 03/15/2004. That was over 22 years ago.
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Location
| State | Washington |
| County | Okanogan |
| Nearest City | Tonasket |
| River/Stream | Tr-okanogan River |
| Coordinates | 48.78387, -119.46395 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 9 ft |
| Dam Length | 375 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 2,720 acre-ft |
| Max Storage | 2,720 acre-ft |
| Normal Storage | 2,144 acre-ft |
| Surface Area | 192 acres |
| Drainage Area | 13 sq mi |
| Max Discharge | 825 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Whitestone Mounatin Orchard Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 03/15/2004 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00326 |
| Federal ID | WA00326 |
| More Info | State Dam Safety Program |