Mc Larty-Edwards Subwtrshd #9 19+77 Reservoir Report
Last Updated: December 15, 2025
Mc Larty-Edwards Subwtrshd #9 19+77, located in Woodbury County, Iowa, is a local government-owned dam with a primary purpose of fire protection, stock, or small fish pond, as well as flood risk reduction.
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Summary
Built in 1966 by the USDA NRCS, this earth dam stands at a height of 33 feet and has a length of 375 feet, with a storage capacity of 43 acre-feet and a surface area of 1.7 acres. The dam is regulated by the Iowa Department of Natural Resources and is inspected, permitted, and enforced by state authorities to ensure its safety and compliance with regulations.
Despite being classified as a low hazard potential structure, Mc Larty-Edwards Subwtrshd #9 19+77 has a moderate risk assessment rating of 3, indicating the need for ongoing risk management measures. The dam's condition is currently not rated, and there is no Emergency Action Plan (EAP) in place. With a drainage area of 0.21 square miles and a controlled spillway type, the dam serves as a crucial infrastructure for water resource management in the region. As climate change continues to impact water resources, the importance of maintaining and monitoring dams like Mc Larty-Edwards Subwtrshd #9 19+77 becomes increasingly critical for ensuring both public safety and environmental sustainability.
Water resource and climate enthusiasts can appreciate the significance of structures like Mc Larty-Edwards Subwtrshd #9 19+77 in managing water flow and mitigating flood risks in the region. As part of the broader network of dams and reservoirs, this dam plays a vital role in supporting local ecosystems, agriculture, and community resilience to extreme weather events. Continued collaboration between local, state, and federal agencies is essential to ensure the long-term safety and effectiveness of dams like Mc Larty-Edwards Subwtrshd #9 19+77 in the face of evolving climate challenges.
Year Completed |
1966 |
Dam Length |
375 |
Dam Height |
33 |
River Or Stream |
TR-MUD CREEK |
Primary Dam Type |
Earth |
Surface Area |
1.7 |
Drainage Area |
0.21 |
Nid Storage |
43 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
13700cfs |
Little Sioux River At Correctionville
|
327cfs |
Perry Creek Near Milnerville
|
25cfs |
West Fork Ditch At Hornick
|
80cfs |
Omaha Cr At Homer
|
45cfs |
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.
Mc Larty-Edwards Subwtrshd #9 19+77