Tomahawk Detention Dam dam
Tomahawk Detention Dam
Tomahawk Detention Dam, located in Valley, Montana, serves as a critical infrastructure managed by the Bureau of Land Management to reduce flood risks along the Willow Creek and Milk River. Constructed in 1962, this gravity dam stands at a structural height of 23 feet and a hydraulic height of 18 feet, with a capacity to store up to 556.3 acre-feet of water. Despite its low hazard potential, recent assessments have deemed its condition unsatisfactory, prompting the need for further inspection and potential risk management measures.
The dam's primary purpose of flood risk reduction highlights its significance in protecting surrounding areas from potential water-related disasters. With a surface area of 95.71 acres and a drainage area of 0.7 square miles, Tomahawk Detention Dam plays a crucial role in safeguarding the local community and infrastructure from the impacts of extreme weather events. While its current risk assessment indicates a moderate level of concern, ongoing efforts by the Bureau of Land Management are essential in ensuring the continued safety and effectiveness of this vital water resource structure.
As enthusiasts in water resources and climate, understanding the intricacies of Tomahawk Detention Dam provides valuable insight into the management and maintenance of essential infrastructure. By staying informed and engaged with the latest data and assessments, individuals can contribute to the preservation and improvement of water resource systems like Tomahawk Detention Dam, ultimately enhancing resilience against the challenges posed by climate change and water-related hazards.
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 Tomahawk Detention Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Milk River At Tampico Mt | 47 cfs | → |
| Milk River At Nashua Mt | 57 cfs | → |
| Beaver Creek Near Hinsdale Mt | 31 cfs | → |
| Milk River At Juneberg Bridge Nr Saco Mt | 178 cfs | → |
| Beaver Cr Bl Guston Coulee Nr Saco Mt | 67 cfs | → |
| Milk River At Malta Mt | 31 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tomahawk Detention Dam.
Track Tomahawk Detention 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 Tomahawk Detention Dam
Where does the data for Tomahawk Detention 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 Tomahawk Detention Dam.