Henry Dam 1 dam
Henry Dam 1
Henry Dam 1, located in Sioux County, Nebraska, is a private earth dam primarily used for irrigation purposes. Built in 1979 by the USDA NRCS, this dam stands at a height of 20 feet and has a storage capacity of 275 acre-feet. The dam spans 933 feet in length and sits on a foundation of soil, with a core made of stone.
Despite its low hazard potential, Henry Dam 1 is currently rated as being in poor condition, with its last inspection in April 2019 revealing the need for maintenance and repairs. The state-regulated dam is under the jurisdiction of the Nebraska Department of Natural Resources, which oversees its permitting, inspection, and enforcement. The dam's location along the TR-Indian Creek tributary highlights its importance in managing water resources for agriculture in the region.
Water resource and climate enthusiasts interested in the sustainability and management of dams like Henry Dam 1 will find this structure a focal point for discussions on infrastructure maintenance, regulatory oversight, and the role of irrigation in the local ecosystem. With its historical significance and vital function in supporting agricultural activities, Henry Dam 1 serves as a reminder of the complex interplay between human development and natural resources in the face of changing environmental conditions.
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 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Hat Cr Near Edgemont Sd | 0 cfs | → |
| Cheyenne R At Edgemont Sd | 5 cfs | → |
| Cheyenne R Below Angostura Dam Sd | 1 cfs | → |
| Cheyenne River Near Spencer | 2 cfs | → |
| Horsehead Cr At Oelrichs Sd | · | → |
| Fall R At Hot Springs Sd | 35 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Henry Dam 1.
Boat launches
- County Highway 6d Fall River County
- Sheps Canyon Road Fall River County
- South Boat Ramp Road Fall River County
Campgrounds
- Toadstool
- Toadstool Geological Park And Campground
- Soldier Creek
- Fort Robinson State Park
- Crawford City Park
Paddle runs
Track Henry Dam 1 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 1
Where does the data for Henry Dam 1 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 1.