Sd Noname 20 dam
Sd Noname 20
Sd Noname 20 is a privately owned dam located in Pennington, South Dakota, along the TR-BOX ELDER CREEK. Constructed in 1963 by the Natural Resources Conservation Service, this earth dam stands at a height of 23 feet and has a length of 360 feet. With a storage capacity of 165 acre-feet, the dam serves the primary purpose of flood control and water resource management in the area.
Despite being state-regulated and inspected, the dam is classified as having a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. The dam also has a maximum discharge capacity of 1260 cubic feet per second, ensuring efficient water flow during periods of heavy rainfall. While the dam has not been modified in recent years, it remains an essential infrastructure for maintaining the water supply and protecting the surrounding community from potential flooding events.
Overall, Sd Noname 20 represents a crucial piece of infrastructure in South Dakota's water resource management system. With its strategic location along TR-BOX ELDER CREEK and its continued state oversight, the dam plays a vital role in safeguarding the local area from the impacts of extreme weather events and ensuring a reliable water supply for the region. As climate change continues to influence weather patterns, the maintenance and monitoring of dams like Sd Noname 20 will be essential in mitigating risks and preserving the resilience of water resources in South Dakota.
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 20 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rapid Cr Near Farmingdale Sd | 27 cfs | → |
| Elk Cr Near Elm Springs Sd | 1 cfs | → |
| Cheyenne River Near Wasta | 61 cfs | → |
| Rapid Cr Bl Sewage Treatment Pl Nr Rapid City | 40 cfs | → |
| Belle Fourche River Near Elm Springs | 95 cfs | → |
| Elk Cr Nr Rapid City Sd | 14 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sd Noname 20.
Campgrounds
- Ellsworth Afb Military
- Sage Creek Campground
- Sage Creek
- Rapid City - Black Hills Koa
- Central States Fairgrounds
- Little Jon Park
Fishing spots
- Lakota Lake
- Rapid Creek Trailhead & Fishing Access
- Sheridan Lake Complex
- Veterans Point Fishing Pier
- Horsethief Lake Day Use Site
- Bismark Lake
More reservoirs
Track Sd Noname 20 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 20
Where does the data for Sd Noname 20 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 20.