Collins No.1 dam
Collins No.1
Collins No.1 is a privately owned dam located on the TR MOREAU RIVER in Harding, South Dakota. Constructed in 1959 by the Natural Resources Conservation Service, this earth dam stands at a height of 23 feet and spans 495 feet in length. With a storage capacity of 55 acre-feet, the dam serves to regulate water flow and provide flood control for the surrounding area. Despite its low hazard potential and current "Not Rated" condition assessment, the dam is subject to state regulations and inspections to ensure its continued safety and functionality.
Situated within the jurisdiction of the South Dakota Department of Environment and Natural Resources, Collins No.1 is equipped with necessary state permitting, inspection, and enforcement mechanisms. Although the dam does not have an Emergency Action Plan (EAP) in place and its risk assessment remains unspecified, it meets state guidelines for operation and maintenance. The dam's maximum discharge capacity is 375 cubic feet per second, further highlighting its crucial role in managing water resources and mitigating potential flooding risks in the region. As a key component of the local water infrastructure, Collins No.1 contributes to the overall resilience of the area against the impacts of climate change and extreme weather events.
With its strategic location and essential functions, Collins No.1 holds significance for water resource and climate enthusiasts alike. As a vital piece of infrastructure in South Dakota, this dam plays a crucial role in safeguarding the surrounding community and ecosystem from the adverse effects of water-related disasters. By adhering to state regulations and undergoing regular inspections, Collins No.1 continues to serve as a reliable asset in water management and climate adaptation efforts. Its low hazard potential and sound structural integrity underscore its importance in ensuring the sustainable use of water resources and resilience in the face of changing climate conditions.
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 Collins No.1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Missouri R At Camp Crook Sd | 4 cfs | → |
| Belle Fourche R At Wy-Sd State Line | 6 cfs | → |
| Inlet Canal Above Belle Fourche Reservoir Sd | 38 cfs | → |
| Belle Fourche R Near Fruitdale Sd | 0 cfs | → |
| Redwater River Above Belle Fourche Sd | 32 cfs | → |
| Belle Fourche River Near Alva | 14 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Collins No.1.
Campgrounds
More reservoirs
Track Collins No.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 Collins No.1
Where does the data for Collins No.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 Collins No.1.