Mc Larty-Edwards Subwtrshd #M 100+30 Reservoir Report
Last Updated: December 14, 2025
Mc Larty-Edwards Subwtrshd #M 100+30, located in Woodbury, Iowa, is a vital water resource managed by local government authorities.
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Summary
This earth dam, constructed in 1966 by USDA NRCS, serves multiple purposes such as fire protection, stock grazing, and flood risk reduction. With a height of 27 feet and a storage capacity of 85 acre-feet, the dam on TR-Mud Creek covers a surface area of 5.1 acres and drains an area of 1.41 square miles.
Despite being classified as low hazard potential, the dam has a moderate risk assessment. It is regulated by the Iowa Department of Natural Resources and undergoes regular inspections, enforcement, and permits. The spillway, which is uncontrolled, poses a potential risk in case of excessive water flow. The dam's condition is currently not rated, indicating a need for further evaluation and maintenance to ensure its structural integrity and safety.
Mc Larty-Edwards Subwtrshd #M 100+30 not only provides essential water storage for fire protection and agricultural activities but also plays a crucial role in mitigating flood risks in the area. With its location on TR-Mud Creek and its history dating back to the 1960s, this dam stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns. Enthusiasts of water resources and climate resilience can appreciate the intricate design and functions of this earth dam, which serves as a lifeline for the local community in Moville, Iowa.
Year Completed |
1966 |
Dam Length |
504 |
Dam Height |
27 |
River Or Stream |
TR-MUD CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.1 |
Drainage Area |
1.41 |
Nid Storage |
85 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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 #M 100+30