Mosquito Creek Watershed Site 6-1 Reservoir Report
Last Updated: December 13, 2025
Mosquito Creek Watershed Site 6-1 is a vital water resource located in the heart of Iowa, specifically in Harrison County.
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Summary
Owned by the local government and designed by USDA NRCS, this site serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. Completed in 1979, this earth dam stands at a height of 46 feet and has a storage capacity of 335 acre-feet, with a normal storage capacity of 92 acre-feet.
With a low hazard potential and a moderate risk assessment rating, Mosquito Creek Watershed Site 6-1 plays a crucial role in water management and conservation efforts in the region. The dam spans a length of 625 feet and covers a drainage area of 1.91 square miles, helping to control the flow of water and prevent flooding during heavy rainfall events. Despite not having a current condition assessment rating, the dam is regularly inspected, maintained, and regulated by the Iowa Department of Natural Resources to ensure its structural integrity and functionality.
For water resource and climate enthusiasts, Mosquito Creek Watershed Site 6-1 represents an essential component of the local ecosystem, providing not only water storage and flood protection but also habitat for aquatic life. With its strategic location and design, this site showcases the intersection of human engineering and environmental stewardship in managing water resources for the benefit of both people and nature.
Year Completed |
1979 |
Dam Length |
625 |
Dam Height |
46 |
River Or Stream |
TR-MOSQUITO CREEK |
Primary Dam Type |
Earth |
Surface Area |
11.8 |
Drainage Area |
1.91 |
Nid Storage |
335 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
46 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Boyer River At Logan
|
417cfs |
West Nishnabotna River At Hancock
|
154cfs |
Missouri River At Omaha
|
17700cfs |
Soldier River At Pisgah
|
112cfs |
East Nishnabotna River Near Atlantic
|
143cfs |
Big Papillion Cr
|
38cfs |
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.
Mosquito Creek Watershed Site 6-1