Henry Dam dam
Henry Dam
Henry Dam, located in Pottawattamie, Iowa, is a privately owned earth dam completed in 1990 for fire protection, stock, and small fish pond purposes. With a height of 27 feet and a length of 600 feet, the dam has a storage capacity of 116 acre-feet and covers a surface area of 5.3 acres. It is regulated by the Iowa Department of Natural Resources and is subject to regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
The dam, designed by the Soil Conservation Service (SCS), is situated on TR-FARM CREEK and managed by the primary owner, a private entity. Despite its low hazard potential and moderate risk assessment rating, the dam's condition has not been formally assessed. While it does not have a controlled spillway, the dam plays a crucial role in water resource management and environmental protection in the region. With its strategic location and functional design, Henry Dam serves as a vital infrastructure for the local community.
In the event of an emergency, the dam's preparedness and risk management measures are still unclear, as details regarding emergency action plans, inundation maps, and risk assessment summaries are not available. However, the dam's importance for fire protection, livestock, and aquatic life highlights its significance for the surrounding area. As water resource and climate enthusiasts, the exploration of Henry Dam offers valuable insights into the intersection of infrastructure development, environmental stewardship, and community resilience in the face of potential water-related challenges.
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 |
|---|---|---|
| East Nishnabotna River At Red Oak | 581 cfs | → |
| West Nishnabotna River At Hancock | 361 cfs | → |
| East Nishnabotna River Near Atlantic | 264 cfs | → |
| West Nishnabotna River At Randolph | 1,030 cfs | → |
| Missouri River At Omaha | 31,200 cfs | → |
| Nodaway River At Clarinda | 3,140 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Henry Dam.
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.