Stemilt Equalizing Reservoir dam
Stemilt Equalizing Reservoir
Located in Malaga, Washington, Stemilt Equalizing Reservoir is a vital infrastructure owned by a Public Utility entity. This reservoir, completed in 1985, serves primarily for irrigation purposes, providing a storage capacity of 43 acre-feet of water. Stemilt Equalizing Reservoir is situated along the Tr-Stemilt Creek-Offstream, with a high hazard potential but currently maintaining a satisfactory condition assessment as of the last inspection in April 2014.
With a hydraulic height of 24 feet and a surface area of 4.6 acres, Stemilt Equalizing Reservoir plays a crucial role in water management and resource allocation in the Chelan County area. Managed and regulated by the Washington Department of Ecology, this earth dam structure ensures the efficient distribution of water for agricultural needs in the region. The reservoir's strategic location and design contribute to its effectiveness in optimizing water storage and discharge, with a maximum discharge capacity of 19 cubic feet per second.
As climate change continues to impact water resources, Stemilt Equalizing Reservoir remains a key asset in maintaining water security and sustainability in the region. With regular inspections and enforcement of safety measures, this reservoir stands as a reliable and essential infrastructure for managing water supply and irrigation demands in Chelan County, Washington. Its role in mitigating water scarcity and supporting agricultural activities underscores the importance of sustainable water management practices in the face of changing environmental conditions.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Stemilt Equalizing Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wenatchee River At Monitor | 4,590 cfs | → |
| Entiat River Near Entiat | 1,080 cfs | → |
| Wenatchee River At Peshastin | 4,710 cfs | → |
| Icicle Creek Above Snow Creek Near Leavenworth | 1,050 cfs | → |
| Mad River At Ardenvoir | 208 cfs | → |
| Yakima River At Umtanum | 2,070 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stemilt Equalizing Reservoir.
Boat launches
- Apple Capital Recreation Loop Trail, East Wenatchee
- Apple Capitol Recreational Loop Trail, Wenatchee
- Russ Road Chelan County
- Apple Capital Recreation Loop Trail, Wenatchee
- Spanish Castle Road Douglas County
- Chelan County
Campgrounds
- Squilchuck State Park Campground
- Wenatchee Confluence State Park
- Wenatchee River County Park
- Tronsen
- Lincoln Rock State Park
- Lion Rock Spring
Paddle runs
- Douglas Creek
- Alpine Lakes Wilderness Boundary To City Of Leavenworth Water Intake In Se1/4 Of Sec 28, T24n, R17e
- Outlet Of Lake Wenatchee To Wenatchee Nf Boundary
- Rock Island Campground To Ida Creek
- Glacier Peak Wilderness Boundary To Confluence With Wenatchee River
- Headwaters At Josephine Lake To Alpine Lakes Wilderness Boundary
Track Stemilt Equalizing Reservoir in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Stemilt Equalizing Reservoir
Where does the data for Stemilt Equalizing Reservoir come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Stemilt Equalizing Reservoir.