Davis Subwatershed M-3398 Reservoir Report
Last Updated: December 13, 2025
Davis Subwatershed M-3398 is a vital water resource located in Woodbury County, Iowa, with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Managed by the local government and designed by USDA NRCS, this earth dam was completed in 1958 and has a height of 47 feet, providing a storage capacity of 71 acre-feet. With a drainage area of 0.37 square miles and a surface area of 2.4 acres, this dam plays a crucial role in flood risk reduction in the region.
The dam's low hazard potential and moderate risk assessment make it an important asset for water management in the area. While its condition has not been rated, state regulation, permitting, inspection, and enforcement ensure that it is maintained and operated effectively. The dam, situated on the TR-Cottonwood Hollow river or stream, serves as a key component in safeguarding the local environment and communities against potential water-related disasters.
Despite its uncontrolled spillway type, Davis Subwatershed M-3398 stands as a reliable structure for water storage and management, contributing to both environmental conservation and public safety in Woodbury County, Iowa. Its strategic location, efficient design, and state oversight make it a valuable resource for protecting against floods and ensuring sustainable water use in the region.
Year Completed |
1958 |
Dam Length |
250 |
Dam Height |
47 |
River Or Stream |
TR-COTTONWOOD HOLLOW |
Primary Dam Type |
Earth |
Surface Area |
2.4 |
Drainage Area |
0.37 |
Nid Storage |
71 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River At Correctionville
|
327cfs |
Missouri River At Decatur
|
15500cfs |
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.
Davis Subwatershed M-3398