Ls Dennis Lindgren 2 Reservoir Report

Last Updated: December 15, 2025

Ls Dennis Lindgren 2 is a privately owned earth dam located in Danbury, Iowa, along the Tr- Maple River.


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Summary

Constructed in 1995 by the USDA NRCS, this dam serves primarily for grade stabilization purposes and has a height of 35 feet and a length of 415 feet. With a storage capacity of 20 acre-feet and a drainage area of 0.11 square miles, the dam has a low hazard potential and a moderate risk assessment rating.

Managed and funded by the Natural Resources Conservation Service, Ls Dennis Lindgren 2 features an uncontrolled spillway with a width of 24 feet and outlet gates also uncontrolled. The dam has not undergone recent inspections and its condition assessment is not available. While the risk assessment is moderate, there are no emergency action plans in place and inundation maps have not been prepared. Despite these challenges, Ls Dennis Lindgren 2 remains an important structure for maintaining grade stability and protecting the surrounding area from potential flooding.

Year Completed

1995

Dam Length

415

Dam Height

35

River Or Stream

Tr- Maple River

Primary Dam Type

Earth

Surface Area

2

Drainage Area

0.11

Nid Storage

20

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
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.