Willwood Diversion dam
Willwood Diversion
Willwood Diversion, located in Park County, Wyoming, along the Shoshone River, is a Federal-owned structure primarily used for irrigation purposes. This concrete dam, completed in 1923 by the Bureau of Reclamation, stands at a height of 70 feet and has a storage capacity of 2100 acre-feet. Despite its low hazard potential, the risk assessment for the dam is rated as high, emphasizing the importance of regular inspections and maintenance.
Managed by the Bureau of Reclamation, Willwood Diversion is regulated, inspected, and enforced by the same federal agency. The dam has a hydraulic height of 41 feet and a length of 476 feet, serving as a crucial water resource infrastructure for the surrounding area. While the condition assessment is not currently available, the dam's emergency action plan status and risk management measures are yet to be determined, highlighting the need for comprehensive safety protocols in case of emergencies.
With a state-regulated status and the presence of a spillway, Willwood Diversion plays a vital role in water management and irrigation activities in the region. The dam's location, design, and operational responsibilities make it a key component in water resource management along the Shoshone River. As climate change continues to impact water availability and usage, structures like Willwood Diversion will be essential in ensuring sustainable water practices for future generations.
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 Willwood Diversion -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Shoshone River Below Buffalo Bill Reservoir | 315 cfs | → |
| South Fork Shoshone River Ab Buffalo Bill Res | 1,250 cfs | → |
| Clarks Fork Yellowstone River Nr Belfry Mt | 5,570 cfs | → |
| Shoshone River Near Lovell | 371 cfs | → |
| North Fork Shoshone River At Wapiti | 3,750 cfs | → |
| Rock Creek Near Red Lodge Mt | 443 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Willwood Diversion.
Boat launches
- Luce Reservoir Boat Launch
- Hogan Reservoir Boat Launch
- Clarks Fork Boat Launch
- Andy Martin Hill Boat Ramp
- North Fork Shoshone River Boat Ramp
Campgrounds
- Homesteader Park
- Hogan And Luce Campground
- Hogan And Luce Campsite 1
- Hogan And Luce Campsite 2
- Hogan And Luce Campsite 3
- Hogan And Luce Campsite 4
Fishing spots
Track Willwood Diversion 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 Willwood Diversion
Where does the data for Willwood Diversion 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 Willwood Diversion.