Little Egypt Subwatershed Sta 62+38 #M Reservoir Report
Last Updated: December 14, 2025
Little Egypt Subwatershed Sta 62+38 #M is a vital water resource in Woodbury County, Iowa, serving multiple purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction.
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Summary
Constructed in 1961 by the USDA NRCS, this earth dam stands at 38 feet high with a length of 300 feet, providing a storage capacity of 147 acre-feet and covering a surface area of 7 acres. Situated along the TR-West Fork Little Sioux River, this dam plays a crucial role in regulating water flow and promoting water conservation in the region.
Managed by the local government and regulated by the Iowa Department of Natural Resources, Little Egypt Subwatershed Sta 62+38 #M has a low hazard potential and is currently rated as 'Not Rated' in terms of condition assessment. Despite its moderate risk level, this dam has not been modified over the years and lacks specific emergency action plans and inundation maps. With a drainage area of 0.57 square miles, this dam serves as a key infrastructure for water management in the area, ensuring the safety and well-being of the local community in Rolly Springs.
As a focal point for water resource and climate enthusiasts, Little Egypt Subwatershed Sta 62+38 #M offers a unique opportunity to study the intersection of water management, environmental conservation, and infrastructure development. With its strategic location and multi-purpose functionality, this dam embodies the complex dynamics of water governance and the importance of sustainable water resource practices in mitigating climate risks. As stakeholders continue to monitor and assess the condition of this dam, it serves as a reminder of the interconnectedness between water resources, climate resilience, and community well-being in the Little Egypt Subwatershed.
Year Completed |
1961 |
Dam Length |
300 |
Dam Height |
38 |
River Or Stream |
TR-WEST FORK LITTLE SIOUX RIV |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.57 |
Nid Storage |
147 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Sioux City
|
13700cfs |
Little Sioux River At Correctionville
|
327cfs |
Floyd River At James
|
187cfs |
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 Sta 62+38 #M