Dean S #1 dam
Dean S #1
Dean S #1 is a privately owned earth dam located in Poplar, Montana, along the TR-Duck Creek. Completed in 1943, the dam stands at 20 feet in height and stretches 300 feet in length, with a storage capacity of 52 acre-feet. The primary purposes of the dam are for fire protection, stock, and small fish pond. While it has not been rated for its condition assessment, the hazard potential is considered low.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), the dam is regulated, permitted, inspected, and enforced by the state agency. Despite not having a designated emergency action plan (EAP) or updated inundation maps, the dam meets state guidelines and poses a low risk according to the available data. The location of Dean S #1 falls under the jurisdiction of Congressional District 00 in Montana, represented by Greg Gianforte (R).
Water resource and climate enthusiasts will find Dean S #1 an intriguing structure for its historical significance and functional purposes. As part of the Omaha District, the dam serves as a vital resource for the local community in terms of fire protection, livestock support, and recreational activities. While the dam's condition assessment is yet to be rated, its low hazard potential and state regulation provide assurance of its safety and stability for the surrounding area. Further research and monitoring could offer valuable insights into the dam's long-term effectiveness in water management and conservation efforts.
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 Dean S #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Redwater River At Circle Mt | 14 cfs | → |
| Missouri River Near Wolf Point Mt | 6,310 cfs | → |
| Nelson Creek Near Van Norman Mt | · | → |
| Poplar River Near Poplar Mt | 37 cfs | → |
| Yellowstone River At Glendive Mt | 18,800 cfs | → |
| Big Muddy Cr Nr Mouth Nr Culbertson Mt | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Dean S #1.
More reservoirs
Track Dean S #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 Dean S #1
Where does the data for Dean S #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 Dean S #1.