Oset #1 dam
Oset #1
Located in Musselshell County, Montana, Oset #1 is a privately owned earth dam completed in 1945 with a primary purpose of providing fire protection, stock, or serving as a small fish pond. Situated along North Willow Creek, this structure has a height of 30 feet and a length of 1000 feet, with a maximum storage capacity of 71 acre-feet. Despite its low hazard potential, Oset #1 is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state permitting, inspection, and enforcement in place to ensure its safe operation.
This dam does not have a designated spillway type or outlet gates, and its condition assessment is currently listed as "Not Rated." Although there are no associated structures or inspection records available, the dam holds a normal storage capacity of 41 acre-feet and serves as a critical resource for fire protection and livestock operations in the area. With its location in a relatively remote region near the city of Mosby, Oset #1 stands as a testament to the importance of water resource management and infrastructure for both human and ecological needs in the Montana landscape.
As water resource and climate enthusiasts, the data on Oset #1 highlights the intersection of human development and natural ecosystems, showcasing the vital role that dams play in supporting various activities such as fire protection, agricultural operations, and habitat conservation. The presence of regulatory oversight and maintenance protocols underscores the commitment to ensuring the safety and functionality of these structures, especially in the face of changing climate conditions and increasing water demands. Oset #1 serves as a reminder of the interconnectedness between water resources, infrastructure, and environmental stewardship in the ongoing efforts to sustainably manage and protect our valuable water assets.
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 Oset #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Musselshell River Near Roundup Mt | 156 cfs | → |
| Musselshell River At Musselshell Mt | 109 cfs | → |
| Flatwillow Creek Near Mosby Mt | 17 cfs | → |
| Musselshell River At Mosby Mt | 112 cfs | → |
| Musselshell River Ab Mud Cr Nr Shawmut Mt | 85 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Oset #1.
Track Oset #1 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 Oset #1
Where does the data for Oset #1 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 Oset #1.