Huff Subwatershed Sta 42+70 #1 Reservoir Report
Last Updated: December 13, 2025
Huff Subwatershed Sta 42+70 #1 is a dam located in Monona, Iowa, designed by the USDA NRCS in 1963 for the primary purposes of fire protection, stock, or small fish pond, as well as flood risk reduction.
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Summary
The dam, standing at a height of 45 feet and stretching 376 feet in length, has a storage capacity of 63 acre-feet and covers a surface area of 3.4 acres. Situated on the TR-MAPLE RIVER, this structure plays a crucial role in managing water resources and mitigating potential hazards in the area.
Owned by the local government and regulated by the Iowa DNR, Huff Subwatershed Sta 42+70 #1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite being uncontrolled, the dam serves as a vital piece of infrastructure in the region, with a moderate risk assessment score of 3 out of 5. While the dam has not been inspected recently, it is equipped for state permitting, inspection, and enforcement, ensuring that it continues to operate efficiently and effectively for the community.
With its strategic location and design, Huff Subwatershed Sta 42+70 #1 stands as a testament to sustainable water resource management in Iowa. As climate change continues to impact the region, structures like this play a pivotal role in safeguarding communities against flooding and ensuring the availability of water for various purposes. As water resource and climate enthusiasts, understanding and appreciating the significance of infrastructure like Huff Subwatershed Sta 42+70 #1 is essential in fostering a resilient and sustainable future for all.
Year Completed |
1963 |
Dam Length |
376 |
Dam Height |
45 |
River Or Stream |
TR-MAPLE RIVER |
Primary Dam Type |
Earth |
Surface Area |
3.4 |
Drainage Area |
0.5 |
Nid Storage |
63 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
West Fork Ditch At Hornick
|
80cfs |
Soldier River At Pisgah
|
112cfs |
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.
Huff Subwatershed Sta 42+70 #1