Norman Dam Reservoir Report

Last Updated: December 8, 2025

Located in Lucas, Iowa, the Norman Dam is a privately owned structure designed by the USDA NRCS and regulated by the Iowa Department of Natural Resources.


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Summary

Built in 1958, this earth dam stands at 24 feet high and spans 502 feet in length. Its primary purpose is for fire protection, stock, or a small fish pond, with a storage capacity of 96 acre-feet and a normal storage of 28 acre-feet.

With a low hazard potential and a moderate risk assessment, the Norman Dam on TR-South Otter Creek at Red Rock Reservoir serves as a crucial resource for water management in the area. While it has not been assessed for its condition, this dam plays a significant role in supporting various activities such as fire protection and livestock water supply. As climate change continues to impact water resources, the maintenance and regulation of structures like the Norman Dam are vital for ensuring the resilience of communities and ecosystems in the region.

Year Completed

1958

Dam Length

502

Dam Height

24

River Or Stream

TR-SOUTH OTTER CREEK

Primary Dam Type

Earth

Surface Area

5.4

Drainage Area

0.37

Nid Storage

96

Hazard Potential

Low

Foundations

Soil

Nid Height

24
       
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.