Woodbury County Roadgrade Dam 18-87-44 Reservoir Report
Last Updated: December 14, 2025
Woodbury County Roadgrade Dam 18-87-44, located in Iowa, is a local government-owned structure on the E.
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Summary
Branch Wolf Creek in the city of GARRETSON DITCH. Completed in 1988, this earth dam stands at a height of 44 feet and has a length of 300 feet, providing a storage capacity of 194 acre-feet. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in managing water resources in the area.
Managed by the Iowa Department of Natural Resources (IOWA DNR), Woodbury County Roadgrade Dam 18-87-44 is regulated, permitted, inspected, and enforced by the state. Despite its structural condition being listed as "Not Rated," this dam serves a primary purpose of "Other" and is designed to control water flow in the region. With a surface area of 2.2 acres and a drainage area of 12 square miles, this dam contributes to flood control efforts and water resource management initiatives.
Woodbury County Roadgrade Dam 18-87-44 is part of the Omaha District of the U.S. Army Corps of Engineers and is situated in a congressional district represented by Steve King. While lacking certain detailed information such as the last inspection date and condition assessment, this dam remains vital for maintaining water quality, preventing flooding, and supporting the overall climate resilience of the region. Enthusiasts of water resources and climate management will find this structure to be a significant component of sustainable infrastructure in Woodbury County, Iowa.
Year Completed |
1988 |
Dam Length |
300 |
Dam Height |
44 |
River Or Stream |
E. BRANCH WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.2 |
Drainage Area |
12 |
Nid Storage |
194 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
44 |
Seasonal Comparison
Weather Forecast
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.
Woodbury County Roadgrade Dam 18-87-44