Cold Springs Dam Reservoir Report

Last Updated: December 13, 2025

Cold Springs Dam, located in Cass, Iowa, was completed in 1949 and stands at a height of 12 feet with a length of 1350 feet.


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Summary

The dam's primary purpose is for recreation, offering a serene environment for water resource and climate enthusiasts to enjoy. Situated on the TR- EAST NISHNABOTNA RIVER, the dam has a low hazard potential and a moderate risk assessment rating.

Managed by the Iowa Department of Natural Resources, Cold Springs Dam is a state-regulated structure, with permitting, inspection, and enforcement processes in place. The dam's earth design and soil foundation contribute to its stability, providing a storage capacity of 75 acre-feet. With a surface area of 15.5 acres and a drainage area of 3.6 square miles, the dam offers a picturesque setting for outdoor activities such as fishing, boating, and wildlife observation.

While Cold Springs Dam may not be the largest or most technologically advanced structure, its contribution to the local community and ecosystem is invaluable. As a hub for outdoor recreation, the dam serves as a vital resource for residents and visitors alike, highlighting the delicate balance between water management, climate considerations, and the sustainable use of natural resources in the region.

Year Completed

1949

Dam Length

1350

Dam Height

12

River Or Stream

TR- EAST NISHNABOTNA RIVER

Primary Dam Type

Earth

Surface Area

15.5

Drainage Area

3.6

Nid Storage

75

Hazard Potential

Low

Foundations

Soil

Nid Height

12
       
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.