Mc Larty-Edwards Subwatershed Site M-5 Reservoir Report
Last Updated: December 14, 2025
Mc Larty-Edwards Subwatershed Site M-5, located in Woodbury, Iowa near the city of Moville, is a vital water resource managed by the local government.
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Summary
This earth dam, constructed in 1966 by the USDA NRCS, serves multiple purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction. With a height of 23 feet and a length of 240 feet, the dam has a storage capacity of 56 acre-feet and covers a surface area of 3 acres, draining an area of 1.65 square miles.
Although classified as having a low hazard potential, the dam at Mc Larty-Edwards Subwatershed Site M-5 is regulated by the Iowa Department of Natural Resources, with state permitting, inspection, and enforcement in place. The spillway, of uncontrolled type, suggests a moderate risk assessment level (3), indicating the need for proper risk management measures. While the dam's condition has not been rated, it is essential for emergency action plans to be prepared and regularly reviewed to ensure the safety of the surrounding community.
Overall, Mc Larty-Edwards Subwatershed Site M-5 plays a crucial role in water resource management in the region, serving both practical and environmental purposes. With its strategic location along TR- Mud Creek and under the oversight of the local government and USDA NRCS, this site represents a harmonious blend of human intervention and natural conservation efforts to safeguard water resources and mitigate potential risks associated with flooding.
Year Completed |
1966 |
Dam Length |
240 |
Dam Height |
23 |
River Or Stream |
TR- MUD CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
1.65 |
Nid Storage |
56 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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 Subwatershed Site M-5