Sd Noname 117 dam
Sd Noname 117
Sd Noname 117 is a privately owned dam located in Pennington, South Dakota, along the TR-CHEYENNE river. Built in 1954, this Earth-type dam stands at 15 feet high and stretches 420 feet in length, providing a storage capacity of 120 acre-feet. With a maximum discharge rate of 1250 cubic feet per second, this dam plays a crucial role in managing water resources and mitigating flood risks in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 117 is regulated, inspected, and enforced to ensure its structural integrity and safety. Despite being rated as having a low hazard potential and not yet assessed for its condition, this dam serves as a key infrastructure for water management in the area. With no associated structures or emergency action plan in place, there is room for further enhancement of its risk management measures to better address potential emergencies.
As a part of the St. Paul District under the US Army Corps of Engineers, Sd Noname 117 represents a significant asset in water resource management in South Dakota. With its vital role in flood control and water storage, this dam underscores the importance of proper monitoring and maintenance to ensure its continued functionality and safety for the surrounding communities and ecosystems.
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 Sd Noname 117 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cheyenne River Near Wasta | 61 cfs | → |
| Elk Cr Near Elm Springs Sd | 1 cfs | → |
| Belle Fourche River Near Elm Springs | 95 cfs | → |
| Rapid Cr Near Farmingdale Sd | 27 cfs | → |
| South Fork Bad R Near Cottonwood Sd | · | → |
| Rapid Cr Bl Sewage Treatment Pl Nr Rapid City | 40 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sd Noname 117.
Campgrounds
Fishing spots
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Track Sd Noname 117 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 Sd Noname 117
Where does the data for Sd Noname 117 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 Sd Noname 117.