Hartman Dam Reservoir Report

Last Updated: December 11, 2025

Hartman Dam, located in Jamison, Iowa, was completed in 1979 by the USDA NRCS and serves multiple purposes including fire protection and stock or small fish pond management.


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Summary

The dam is privately owned and regulated by the Iowa Department of Natural Resources, with a low hazard potential and a moderate risk assessment rating. Situated on TR-Squaw Creek, the earth dam stands at 29 feet high and spans 420 feet in length, with a storage capacity of 44 acre-feet and a surface area of 10.1 acres.

The dam, constructed with a soil foundation, features an uncontrolled spillway and does not have any outlet gates or associated structures. It is designed for the protection of local resources and wildlife, with a focus on maintaining a sustainable water supply and ecosystem balance. Despite not having a current condition assessment rating, the dam is regularly inspected and meets state regulatory standards for operation and maintenance.

Water resource and climate enthusiasts can appreciate Hartman Dam for its role in managing water resources and supporting local biodiversity. The dam's presence along TR-Squaw Creek helps to regulate water flow and provides a habitat for fish and wildlife. As a privately owned structure with state oversight, Hartman Dam exemplifies the importance of responsible water management practices in the face of changing climate conditions.

Year Completed

1979

Dam Length

420

Dam Height

29

River Or Stream

TR-SQUAW CREEK

Primary Dam Type

Earth

Surface Area

10.1

Drainage Area

0.15

Nid Storage

44

Hazard Potential

Low

Foundations

Soil

Nid Height

29
       
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.