Little Sioux River Bedgrade Control Reservoir Report
Last Updated: December 13, 2025
Located in Harrison County, Iowa, the Little Sioux River Bedgrade Control structure serves as a crucial tool for grade stabilization along the Little Sioux River.
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Summary
Constructed in 1985, this structure stands at a height of 8 feet and spans 170 feet in length, with a storage capacity of 125 acre-feet. With a drainage area of 3538 acres, this structure plays a vital role in managing water flow and preventing erosion in the surrounding area.
Managed by the Iowa Department of Natural Resources, the Little Sioux River Bedgrade Control is regulated and inspected by state authorities to ensure its functionality and safety. Despite being rated as having a low hazard potential and not yet assessed for condition, this structure remains a key component in water resource management in the region. With its primary purpose being grade stabilization, this structure showcases a commitment to sustainable water management practices in Iowa.
Enthusiasts of water resources and climate will appreciate the significance of the Little Sioux River Bedgrade Control in maintaining the ecological balance along the Little Sioux River. As a local government-owned structure, this grade stabilization system exemplifies the collaborative efforts between state agencies and communities to protect water resources and prevent environmental degradation. With its strategic location and design, this structure stands as a testament to the importance of proactive measures in managing water flow and safeguarding against potential hazards in the region.
Year Completed |
1985 |
Dam Length |
170 |
Dam Height |
8 |
River Or Stream |
Little Sioux River |
Drainage Area |
3538 |
Nid Storage |
125 |
Hazard Potential |
Low |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Soldier River At Pisgah
|
112cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River Near Turin
|
1040cfs |
Missouri River At Decatur
|
15200cfs |
Boyer River At Logan
|
417cfs |
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 Sioux River Bedgrade Control