Little Egypt Subwatershed 9-2670 Reservoir Report
Last Updated: December 14, 2025
Little Egypt Subwatershed 9-2670 in Woodbury, Iowa, is a significant water resource managed by the local government with assistance from the USDA NRCS.
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Summary
This subwatershed features an earth dam that was completed in 1961 for fire protection, stock, and small fish pond purposes, as well as flood risk reduction. The dam has a height of 46 feet and a storage capacity of 36 acre-feet, serving a drainage area of 0.21 square miles along the TR-West Fork Little Sioux River.
With a low hazard potential and a moderate risk assessment, the dam at Little Egypt Subwatershed 9-2670 is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement. Despite not being rated for condition assessment, the dam plays a crucial role in managing water resources in the area and ensuring water security for the local community. As water resource and climate enthusiasts, monitoring and supporting the maintenance of this dam is essential for sustainable water management in the region.
Year Completed |
1961 |
Dam Length |
750 |
Dam Height |
46 |
River Or Stream |
TR-WEST FORK LITTLE SIOUX RIV |
Primary Dam Type |
Earth |
Surface Area |
2.1 |
Drainage Area |
0.21 |
Nid Storage |
36 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
46 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Sioux City
|
13700cfs |
Floyd River At James
|
187cfs |
Little Sioux River At Correctionville
|
327cfs |
Omaha Cr At Homer
|
45cfs |
Maple River At Mapleton
|
323cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Little Egypt Subwatershed 9-2670