Pilot Rock Subwtrshd Sta 33+37 #1 Reservoir Report
Last Updated: December 14, 2025
Pilot Rock Subwtrshd Sta 33+37 #1, located in Cherokee, Iowa, is a vital earth dam completed in 1963 by the USDA NRCS to serve multiple purposes including fire protection, stock, small fish pond management, and flood risk reduction.
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Summary
This structure, owned by the local government, has a storage capacity of 134 acre-feet, with a normal storage level of 54 acre-feet and a surface area of 5 acres. The dam's primary purpose is to provide essential water resources for the surrounding area, particularly for fire protection and agricultural needs.
Managed by the Iowa Department of Natural Resources, this low-hazard dam on the TR-Little Sioux River has a drainage area of 0.87 square miles and a maximum discharge capacity of 0 cfs. The dam's moderate risk level is attributed to its condition assessment being "Not Rated," highlighting the need for regular inspections and risk management measures to ensure the safety and functionality of the structure. Despite its low hazard potential, the dam plays a crucial role in water resource management and protection in the region, emphasizing the importance of maintaining and monitoring such infrastructure in the face of changing climate conditions.
With a solid foundation on soil, Pilot Rock Subwtrshd Sta 33+37 #1 stands at a height of 43 feet and a length of 1056 feet, reflecting its significant contribution to flood risk reduction efforts in the area. Supported by the Natural Resources Conservation Service, this earth dam serves as a key component of the local water resource infrastructure, highlighting the importance of sustainable water management practices in the face of climate change challenges. As water resource and climate enthusiasts, understanding and supporting the maintenance and regulation of such structures is crucial for ensuring the resilience and safety of communities in the face of evolving environmental conditions.
Year Completed |
1963 |
Dam Length |
1056 |
Dam Height |
43 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.87 |
Nid Storage |
134 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
43 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Little Sioux River At Linn Grove
|
257cfs |
Floyd River At Alton
|
36cfs |
Ocheyedan River Near Spencer
|
59cfs |
North Raccoon River Near Sac City
|
312cfs |
Maple River At Mapleton
|
323cfs |
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.
Pilot Rock Subwtrshd Sta 33+37 #1