The Eightmile Lake Outlet Dam, located in Chelan, Washington, serves as a crucial structure for both irrigation and recreational purposes.
Wind
Humidity
Built in 1933, this rockfill dam stands at a hydraulic height of 22 feet and a structural height of 19 feet, with a length of 200 feet. The dam has a storage capacity of 1610 acre-feet and covers a surface area of 65 acres, drawing water from Eightmile Creek.
Despite its importance, the dam poses a high hazard potential due to its poor condition assessment as of October 2018. The Washington Dept of Ecology regulates and inspects the dam regularly, with inspections occurring every five years. The dam's emergency action plan was last updated in September 2018, ensuring that proper measures are in place for any potential risks or emergencies. As an enthusiast of water resources and climate, staying informed about the condition and maintenance of the Eightmile Lake Outlet Dam is crucial for understanding its impact on the surrounding ecosystem and communities.
Year Completed |
1933 |
Dam Length |
200 |
River Or Stream |
Eightmile Creek |
Primary Dam Type |
Rockfill |
Surface Area |
65 |
Hydraulic Height |
22 |
Drainage Area |
5.85 |
Nid Storage |
1610 |
Structural Height |
19 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
22 |
Icicle Creek Above Snow Creek Near Leavenworth
|
1750cfs |
Wenatchee River At Peshastin
|
11200cfs |
Wenatchee River At Plain
|
8010cfs |
Wenatchee River At Monitor
|
12000cfs |
Chiwawa River Near Plain
|
1200cfs |
Mad River At Ardenvoir
|
197cfs |
| Location | Reservations | Toilets |
|---|---|---|
Trout Lake Creek
|
||
Leprechaun Lake Backcountry Camping
|
||
Bridge Creek Camping
|
||
Eightmile Campground
|
||
Icicle Group Campground
|
||
Johnny Creek
|
Rock Island Campground to Ida Creek
Alpine Lakes Wilderness Boundary To City Of Leavenworth Water Intake In Se1/4 Of Sec 28, T24N, R17E
Headwaters At Josephine Lake To Alpine Lakes Wilderness Boundary
Outlet Of Lake Wenatchee To Wenatchee Nf Boundary
Alpine Lakes Wilderness Boundary To Private Land Boundary At North Section Line Of Sec 3, T23N, R14E
Headwaters In Nw1/4 Of Sec 12, T24N, R13E To Alpine Lakes Wilderness Boundary