Lyon Lake Dam dam
Lyon Lake Dam
Lyon Lake Dam, located in Grant County, Washington, was completed in 1971 and serves primarily for recreational purposes. This earth dam with stone core types stands at a hydraulic height of 13 feet and a structural height of 9 feet, creating a reservoir with a storage capacity of 68 acre-feet. The dam is regulated and inspected by the Washington Department of Ecology, ensuring its safety and compliance with state regulations.
Situated on Tr-Crab Creek, Lyon Lake Dam poses a low hazard potential and has not been rated for its condition. Despite not having an Emergency Action Plan (EAP) in place or meeting certain guidelines, the dam continues to provide essential water resource management and recreational opportunities for the surrounding community. With its location within Congressional District 04, Washington, Lyon Lake Dam stands as a testament to responsible water infrastructure development and management in the region.
Overall, Lyon Lake Dam represents a vital piece of water resource infrastructure in Washington, offering both recreational benefits and water management capabilities. While it may not be without its challenges in terms of emergency preparedness and condition assessment, the dam serves as a crucial asset for the local area and underscores the importance of sustainable water resource practices in the face of climate change.
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 Lyon Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Crab Creek Near Moses Lake | 50 cfs | → |
| Crab Creek At Irby | 9 cfs | → |
| Wilson Creek Below Corbett Draw Near Almira | 0 cfs | → |
| Crab Creek Near Beverly | 180 cfs | → |
| Chelan River At Chelan | 268 cfs | → |
| Coal Creek At Mohler | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lyon Lake Dam.
Boat launches
- Road L.2 Northeast 3585, Moses Lake
- Juniper Street North Soap Lake
- Battery Road, Moses Lake
- Longlake Shores Drive Northeast, Soap Lake
- Wa 17 Grant County
Track Lyon Lake Dam 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 Lyon Lake Dam
Where does the data for Lyon Lake Dam 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 Low 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 Lyon Lake Dam.