Horton Dam #2 dam
Horton Dam #2
Horton Dam #2, located in Roberts, South Dakota, is a privately owned Earth dam completed in 1976. With a height of 18 feet and a length of 400 feet, this dam serves as a crucial resource for the surrounding area, providing a maximum storage capacity of 116 acre-feet. The dam controls the flow of TR-AGENCY CREEK and has a low hazard potential, making it a safe and reliable structure for water management in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Horton Dam #2 is regulated, permitted, inspected, and enforced to ensure its safety and efficiency. While the dam's condition assessment is currently marked as "Not Rated," its emergency action plan status, risk assessment, and other safety measures are not yet fully documented. With a maximum discharge capacity of 800 cubic feet per second, the dam plays a vital role in flood control and water resource management in the area.
Although Horton Dam #2 has not been assigned a Dam Safety Action Classification (DSAC) or undergone a detailed risk assessment, its low hazard potential and state-regulated status suggest that it is well-maintained and poses little risk to the surrounding community. As a key infrastructure in the region, this dam serves as a testament to the importance of proper management and maintenance of water resources in the face of changing climates and environmental challenges.
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 Horton Dam #2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Minnesota River Near Peever | 56 cfs | → |
| Big Sioux River Nr Florence Sd | 7 cfs | → |
| Bois De Sioux River Near White Rock | 96 cfs | → |
| Whetstone River Near Big Stone City | 64 cfs | → |
| Minnesota River At Ortonville | 81 cfs | → |
| Big Sioux R Near Watertown Sd | 30 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Horton Dam #2.
Boat launches
- Mn 27 4906, Traverse County
- Mn 27 4924, Traverse County
- Roberts County
- T149 5800, Traverse County
- Roy Lake State Park
- Rocky Point Big Stone City
Track Horton Dam #2 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 Horton Dam #2
Where does the data for Horton Dam #2 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 Horton Dam #2.