Hook #23 dam
Hook #23
Located in Rosebud, Montana, Hook #23 is a private earth dam built in 1935 for fire protection, stock, and small fish pond purposes. With a height of 16 feet and a length of 350 feet, the dam has a storage capacity of 256 acre-feet and a normal storage of 137 acre-feet. Situated on TR-South Sunday Creek, this low hazard potential structure is under the regulatory jurisdiction of the Montana Department of Natural Resources and Conservation (DNRC), with state permitting, inspection, and enforcement in place.
Although the condition of Hook #23 is currently not rated, its hazard potential is classified as low. The dam has not been modified in recent years, and there is no emergency action plan (EAP) in place. Despite these factors, the structure continues to serve its intended purposes effectively. With its location in a picturesque setting and its historical significance dating back to the 1930s, Hook #23 is a notable feature for water resource and climate enthusiasts interested in the management and conservation of Montana's water infrastructure.
Overall, Hook #23 stands as a testament to the early efforts in water resource management in Montana, providing essential services for fire protection and agricultural needs. While its condition assessment may be pending, the dam's low hazard potential and operational history make it a valuable asset in the region. As climate change continues to impact water resources, structures like Hook #23 play a vital role in supporting the local community and ecosystem, showcasing the importance of sustainable water management practices 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 Hook #23 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellowstone River At Miles City Mt | 10,600 cfs | → |
| Tongue River At Miles City Mt | 61 cfs | → |
| Yellowstone River At Forsyth Mt | 10,500 cfs | → |
| Pumpkin Creek Near Miles City Mt | 0 cfs | → |
| Powder River Near Locate Mt | 17 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 Hook #23.
Track Hook #23 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 Hook #23
Where does the data for Hook #23 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.