Gray 13 dam
Gray 13
Gray 13 is a federal-owned structure located in Rosebud, Montana, with a primary purpose of fire protection, stock, or small fish pond. Built in 1940 by the USDA NRCS, this earth dam stands at a height of 20 feet and spans 175 feet in length, providing a storage capacity of 219 acre-feet. Situated on Cottonwood Creek N Fork, Gray 13 serves as a vital resource for water management and conservation in the region.
Despite its low hazard potential, the condition assessment of Gray 13 is currently marked as "Not Available," with no recent inspection date provided. The emergency action plan status, inundation maps, risk assessment, and risk management measures are also listed as unavailable. With its importance in fire protection and water storage, it is crucial to ensure regular inspection and maintenance of Gray 13 to uphold its functionality and safety for both agricultural and environmental purposes.
As a key component in the water infrastructure of Rosebud, Montana, Gray 13 warrants attention from water resource and climate enthusiasts to advocate for proper monitoring and maintenance practices. With its historical significance and essential role in water management, this structure serves as a reminder of the importance of sustainable water resource management 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 Gray 13 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellowstone River At Forsyth Mt | 10,500 cfs | → |
| Yellowstone River At Miles City Mt | 10,600 cfs | → |
| Tongue River At Miles City Mt | 61 cfs | → |
| Pumpkin Creek Near Miles City Mt | 0 cfs | → |
| Bighorn River Ab Tullock Cr Nr Bighorn Mt | 2,040 cfs | → |
| Tongue R Bl Brandenberg Bridge Nr Ashland Mt | 223 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Gray 13.
More reservoirs
Track Gray 13 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 Gray 13
Where does the data for Gray 13 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 Gray 13.