Castle Rock Reservoir Dam dam
Castle Rock Reservoir Dam
Castle Rock Reservoir Dam, located in Rosebud, Montana, is a vital public utility structure that serves as a key water resource in the region. Completed in 1976, this Earth type dam stands at a height of 67 feet and has a storage capacity of 3540 acre-feet, providing essential water storage for the surrounding area. The dam is situated on the TR-East Fork Armells Creek, with a drainage area of 0.89 square miles, ensuring a reliable water supply for the community.
Managed by the Montana Department of Environmental Quality (DEQ), Castle Rock Reservoir Dam is regularly inspected and regulated to ensure its safety and functionality. With a high hazard potential but a satisfactory condition assessment, the dam plays a critical role in flood control and water management in the region. The dam's emergency action plan is in place to address any potential risks and ensure the safety of nearby residents in the event of an emergency.
With its strategic location and significant water storage capacity, Castle Rock Reservoir Dam plays a crucial role in water resource management in Montana. As a key public utility structure, it provides essential water supply for the community while ensuring safety and compliance with regulatory standards. The dam's continued maintenance and inspection underscore its importance in protecting the surrounding area from potential hazards and ensuring a reliable water source for years to come.
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 Castle Rock Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Tongue R Bl Brandenberg Bridge Nr Ashland Mt | 223 cfs | → |
| Yellowstone River At Forsyth Mt | 10,500 cfs | → |
| Otter Creek At Ashland Mt | 3 cfs | → |
| Tongue R At Birney Day School Br Nr Birney Mt | 332 cfs | → |
| Rosebud C At Reservation Bndry Nr Kirby Mt | 8 cfs | → |
| Hanging Woman Creek Near Birney Mt | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Castle Rock Reservoir Dam.
Track Castle Rock Reservoir 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 Castle Rock Reservoir Dam
Where does the data for Castle Rock Reservoir 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 High 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 Castle Rock Reservoir Dam.