Schaper Dam Reservoir Report

Last Updated: April 26, 2026

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Schaper Dam, located in Warren County, Iowa, serves multiple purposes including fire protection, stock, and small fish pond management.


Summary

The dam, constructed in 2002 by NRCS, is primarily owned and regulated by a private entity. It stands at a height of 28 feet and spans a length of 310 feet, with a maximum storage capacity of 72 acre-feet and a normal storage capacity of 31 acre-feet. The dam's spillway, of uncontrolled type, has a width of 1 foot.

Despite its low hazard potential, Schaper Dam is deemed to have a moderate risk level, with a risk assessment rating of 3. The dam's condition assessment is currently listed as "Not Rated," and there is no available information on its emergency action plan or inundation maps. The dam is situated on TR- Coal Creek, near the city of RED ROCK RESERVOIR, and falls under the jurisdiction of the Iowa Department of Natural Resources for regulation and inspection. Climate and water resource enthusiasts may find Schaper Dam to be an interesting case study for its unique design and multi-purpose functionality.

15-Day Long Term Forecast


Year Completed

2002

Dam Length

310

Dam Height

28

River Or Stream

TR- COAL CREEK

Primary Dam Type

Earth

Surface Area

4.4

Drainage Area

0.33

Nid Storage

72

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
Seasonal Comparison

5-Day Hourly Forecast Detail

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.
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