Henry Dam dam
Henry Dam
Henry Dam, located in Ardmore, South Dakota, is a privately owned earth dam built in 1951 with a maximum storage capacity of 160 acre-feet. The dam stands at a height of 20 feet and spans a length of 950 feet along the TR-Cheyenne river. Despite being classified as low hazard potential, the dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources, ensuring its safety and compliance with state regulations.
Owned by a private entity, Henry Dam plays a crucial role in water resource management in the Fall River County area. With a normal storage capacity of 122 acre-feet and a maximum discharge rate of 650 cubic feet per second, the dam serves as a vital infrastructure for flood control and water supply. Managed by the Natural Resources Conservation Service, the dam has not been rated for its current condition but undergoes regular inspections to ensure its structural integrity.
Located within the jurisdiction of the state, Henry Dam stands as a testament to effective water resource management in South Dakota. With its low hazard potential and adherence to state regulatory standards, the dam serves as a reliable asset for the community, providing essential water storage and flood protection services. Climate and water enthusiasts can appreciate the strategic design and purposeful construction of Henry Dam in safeguarding the local environment and enhancing water resource sustainability.
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 Henry Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Hat Cr Near Edgemont Sd | 0 cfs | → |
| Horsehead Cr At Oelrichs Sd | · | → |
| Cheyenne R At Edgemont Sd | 3 cfs | → |
| Cheyenne R Below Angostura Dam Sd | 1 cfs | → |
| Fall R At Hot Springs Sd | 34 cfs | → |
| Beaver Cr Near Buffalo Gap Sd | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Henry Dam.
Boat launches
- County Highway 6d Fall River County
- Sheps Canyon Road Fall River County
- Fall River County
- Whitney Lake
- South Boat Ramp Road Fall River County
Campgrounds
- Toadstool
- Toadstool Geological Park And Campground
- Soldier Creek
- Angostura State Rec Area
- Crawford City Park
- Fort Robinson State Park
Paddle runs
Track Henry 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 Henry Dam
Where does the data for Henry 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 Henry Dam.