Bethel #11 dam
Bethel #11
Bethel #11 is a privately owned earth dam located in Mosby, Montana, along the TR-Flatwillow Creek. Built in 1957, this dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 22 feet and a length of 350 feet, Bethel #11 has a storage capacity of 72 acre-feet and a normal storage of 18 acre-feet. Despite being rated as having a low hazard potential, the dam's condition has not been assessed.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Bethel #11 is regulated by the state and undergoes regular inspections and enforcement measures. The dam is situated in Congressional District 00, represented by Greg Gianforte, and falls under the jurisdiction of Omaha District of the US Army Corps of Engineers. Although there is no specific spillway type or outlet gates listed, the dam's emergency action plan status and risk assessment are not provided in the data.
Water resource and climate enthusiasts interested in the ecological impact of dams and water storage structures in the region may find Bethel #11 particularly intriguing. Its location in Petroleum County, Montana, and its proximity to the TR-Flatwillow Creek present opportunities for studying the interactions between human-made infrastructure and natural water systems. Additionally, the lack of detailed information on the dam's modifications, outlet structures, and emergency preparedness highlights the importance of comprehensive data collection and monitoring for maintaining the safety and sustainability of water resources in the area.
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 Bethel #11 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Flatwillow Creek Near Mosby Mt | 18 cfs | → |
| Musselshell River At Mosby Mt | 80 cfs | → |
| Musselshell River At Musselshell Mt | 90 cfs | → |
| Musselshell River Near Roundup Mt | 167 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Bethel #11.
More reservoirs
Track Bethel #11 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 Bethel #11
Where does the data for Bethel #11 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 Bethel #11.