Stanley Dam Reservoir Report

Last Updated: December 13, 2025

Stanley Dam, located in Carlisle, Iowa, was completed in 1967 and serves multiple purposes including fire protection, stock maintenance, and small fish pond management.


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Summary

This earth dam, with a height of 22 feet and a length of 608 feet, has a storage capacity of 67 acre-feet and covers a surface area of 5.1 acres. It is regulated by the Iowa Department of Natural Resources and is used for water resource management in the Middle South Creek watershed.

Despite its low hazard potential and moderate risk assessment, Stanley Dam has not been rated for its condition assessment. The dam features an uncontrolled spillway type and is privately owned, highlighting the importance of private ownership in water resource management. With its location in Warren County, Iowa, the dam serves as a vital infrastructure for local water supply, agricultural operations, and wildlife habitat enhancement in the region.

As a key structure in the Rock Island District, Stanley Dam underscores the significance of private dam ownership in maintaining water resources and climate resilience. With its strategic location and multiple purposes, the dam plays a crucial role in the sustainable management of water resources and underscores the need for ongoing inspection, monitoring, and risk assessment to ensure its long-term functionality and safety.

Year Completed

1967

Dam Length

608

Dam Height

22

River Or Stream

TR-MIDDLE SOUTH CREEK

Primary Dam Type

Earth

Surface Area

5.1

Drainage Area

0.39

Nid Storage

67

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
Seasonal Comparison

Weather Forecast

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.