Dutch Hollow Subwatershed Site 1-8 Reservoir Report
Last Updated: December 15, 2025
Dutch Hollow Subwatershed Site 1-8 in Woodbury, Iowa, is a local government-owned dam designed by the USDA NRCS and regulated by the Iowa DNR.
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Summary
Completed in 1994, this earth dam serves multiple purposes, including fire protection, stock, or small fish pond, and flood risk reduction. With a height of 45 feet and a length of 706 feet, the dam can store up to 553 acre-feet of water, making it a crucial resource for the surrounding area.
Located in the SW, NE section of S14, T086N, R42W, near the TR-Koker Creek, Dutch Hollow Subwatershed Site 1-8 covers a drainage area of 3.04 square miles and has a surface area of 21.8 acres. Despite its low hazard potential and moderate risk assessment, the dam's condition is not rated, and its emergency action plan (EAP) status is unclear. With no recent inspection date available, it is essential for local authorities to ensure regular maintenance and monitoring to safeguard the dam's integrity and the surrounding community's safety.
As a key infrastructure for water resource management in the region, Dutch Hollow Subwatershed Site 1-8 plays a vital role in mitigating flood risks and providing essential services to the community. With proper oversight and maintenance, this dam will continue to serve its intended purposes effectively while contributing to the overall resilience of the area to water-related challenges.
Year Completed |
1994 |
Dam Length |
706 |
Dam Height |
45 |
River Or Stream |
TR- KOKER CREEK |
Primary Dam Type |
Earth |
Surface Area |
21.8 |
Drainage Area |
3.04 |
Nid Storage |
553 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |
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.
Dutch Hollow Subwatershed Site 1-8