Croy Subwatershed Site 1-1292 Reservoir Report
Last Updated: December 14, 2025
Croy Subwatershed Site 1-1292, located in Monona, Iowa, is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
Built in 1952 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock, and small fish pond maintenance, as well as flood risk reduction for the TR- Maple River. With a dam height of 36 feet and a storage capacity of 31 acre-feet, this site plays a crucial role in water management within the region.
Despite its low hazard potential, the condition assessment for Croy Subwatershed Site 1-1292 is currently marked as "Not Rated," highlighting the need for ongoing monitoring and evaluation. The risk assessment categorizes it as moderate, emphasizing the importance of implementing risk management measures to ensure the safety and functionality of the dam. With a drainage area of 0.1 square miles and a normal storage capacity of 17 acre-feet, this site is a key component in the overall water management strategy for the area.
As water resource and climate enthusiasts, it is essential to recognize the significance of sites like Croy Subwatershed Site 1-1292 in preserving and protecting our natural resources. By understanding the purpose, design, and regulatory framework of this dam, we can appreciate the intricate balance between human intervention and environmental sustainability. With a focus on risk assessment and management, we can work towards ensuring the long-term viability of this critical water infrastructure for the benefit of both the local community and the surrounding ecosystem.
Year Completed |
1952 |
Dam Height |
36 |
River Or Stream |
TR- MAPLE RIVER |
Primary Dam Type |
Earth |
Drainage Area |
0.1 |
Nid Storage |
31 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Maple River At Mapleton
|
323cfs |
Soldier River At Pisgah
|
112cfs |
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Decatur
|
14900cfs |
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.
Croy Subwatershed Site 1-1292