Lundberg Dam Reservoir Report

Last Updated: December 16, 2025

Lundberg Dam, located in Montgomery, Iowa, was completed in 1967 by the USDA NRCS and serves multiple purposes including fire protection, stock, and small fish pond.


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Summary

The earth dam stands at 31 feet high and spans a length of 770 feet, with a storage capacity of 67 acre-feet. The dam is state-regulated by the Iowa DNR and is inspected regularly to ensure its safety and functionality.

Despite being classified as having a low hazard potential, Lundberg Dam presents a moderate risk level due to its location on TR-Ramp Creek. The dam's uncontrolled spillway and soil foundation further contribute to its risk assessment. The dam has not been rated for its condition, but it meets state inspection requirements and is equipped for emergency response if needed. With a surface area of 5.7 acres and a drainage area of 0.57 square miles, Lundberg Dam plays a crucial role in water resource management in the area.

Overall, Lundberg Dam stands as a vital structure for water resource management in the region, providing essential services for fire protection, stock, and small fish pond purposes. While its hazard potential is low, its moderate risk level underscores the importance of regular inspections and maintenance to ensure the safety and reliability of the dam. With state regulation and oversight by the Iowa DNR, Lundberg Dam continues to be a key feature in the local water infrastructure for the community of Essex and beyond.

Year Completed

1967

Dam Length

770

Dam Height

31

River Or Stream

TR-RAMP CREEK

Primary Dam Type

Earth

Surface Area

5.7

Drainage Area

0.57

Nid Storage

67

Hazard Potential

Low

Foundations

Soil

Nid Height

31
       
Seasonal Comparison

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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.