Perion Subwatershed Site B-700 Reservoir Report
Last Updated: December 14, 2025
Perion Subwatershed Site B-700, located in Ida Grove, Iowa, is a vital water resource managed by the local government for purposes such as fire protection, stock, and small fish ponds.
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Summary
This earth dam, completed in 1949 by the USDA NRCS, has a height of 22 feet and a storage capacity of 70 acre-feet. The dam serves to reduce flood risks and is regulated by the Iowa Department of Natural Resources, ensuring proper inspection, enforcement, and permitting to maintain its functionality.
With a low hazard potential and a moderate risk assessment rating, Perion Subwatershed Site B-700 is a crucial component of water resource management in the area. The dam's uncontrolled spillway and soil foundation are designed to handle potential emergencies, although its condition assessment is currently not rated. Despite its age, the dam continues to play a significant role in protecting the surrounding area from water-related risks, making it an essential site for water and climate enthusiasts to monitor and study.
For those interested in water resource and climate conservation, Perion Subwatershed Site B-700 offers a unique opportunity to observe the intersection of infrastructure, regulation, and environmental protection. As a key structure in the Rock Island District managed by the Natural Resources Conservation Service, the dam's role in flood risk reduction and water storage is crucial for the surrounding community. With a focus on emergency preparedness and risk management, this site serves as a valuable case study for understanding the importance of sustainable water resource practices in mitigating climate-related challenges.
Year Completed |
1949 |
Dam Height |
22 |
River Or Stream |
TR- ELK CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.33 |
Nid Storage |
70 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
North Raccoon River Near Sac City
|
312cfs |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River At Linn Grove
|
257cfs |
Little Sioux River Near Turin
|
1040cfs |
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.
Perion Subwatershed Site B-700