Irwin Dam dam
Irwin Dam
Irwin Dam, located in Tripp, South Dakota, stands as a significant earth dam structure along the White River off stream. Completed in 1938, this privately owned dam has a height of 20 feet and a length of 1400 feet, providing vital water storage with a capacity of 684 acre-feet. The dam's primary purpose and specific design features remain unspecified, but its low hazard potential and "Not Rated" condition assessment suggest a stable and secure structure.
Operated by a private entity and regulated by the South Dakota Department of Agriculture and Natural Resources, Irwin Dam has undergone inspections for safety and compliance with state regulations. Despite not being associated with any federal agencies, the dam plays a crucial role in water resource management within the region. With its low hazard potential and limited risk assessment data available, Irwin Dam serves as a key component in the local water infrastructure, contributing to the overall climate resilience and water security in the area.
Although lacking detailed information on emergency action plans and risk management measures, Irwin Dam remains a vital piece of infrastructure in maintaining water resources in South Dakota. With its historical significance dating back to the late 1930s, the dam continues to provide essential water storage and management capabilities for the surrounding community. As climate enthusiasts and water resource stakeholders, understanding and monitoring the condition and operation of Irwin Dam is essential in ensuring its continued effectiveness and safety for years to come.
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 Irwin Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Keya Paha R At Wewela Sd | 52 cfs | → |
| Keya Paha R Near Keyapaha Sd | 23 cfs | → |
| White R Near Oacoma Sd | 100 cfs | → |
| Platte Creek Near Platte | 0 cfs | → |
| Niobrara River At Mariaville | 1,150 cfs | → |
| Long Pine Creek Near Riverview | 200 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Irwin Dam.
Track Irwin Dam 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 Irwin Dam
Where does the data for Irwin Dam 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 Irwin Dam.