North Pigeon Cr Watershed Site 4-1 Reservoir Report

Last Updated: December 14, 2025

North Pigeon Cr Watershed Site 4-1 in Pottawattamie, Iowa, is a vital water resource managed by the local government with assistance from the USDA NRCS.


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Summary

This earth dam, completed in 1971, serves multiple purposes including fire protection, stock watering, and small fish pond management. With a dam height of 57 feet and a storage capacity of 302 acre-feet, this structure plays a crucial role in flood risk reduction for the surrounding area.

Located on TR-PIGEON CREEK, this dam covers a drainage area of 0.39 square miles and has a surface area of 11.9 acres. Despite being rated as having a low hazard potential, it is considered to have a moderate risk level. Regular inspection and maintenance by the Iowa DNR ensure that the dam remains in good condition to fulfill its functions effectively. The site is also in compliance with state regulations, including permitting, inspection, and enforcement requirements.

North Pigeon Cr Watershed Site 4-1 is an essential component of the water management infrastructure in the region, contributing to both water supply and flood mitigation efforts. With its strategic location and design, this dam stands as a testament to effective collaboration between local government agencies and federal partners in ensuring the sustainability and safety of water resources in the area. For water resource and climate enthusiasts, this site serves as a prime example of responsible water management practices in action.

Year Completed

1971

Dam Length

1104

Dam Height

57

River Or Stream

TR-PIGEON CREEK

Primary Dam Type

Earth

Surface Area

11.9

Drainage Area

0.39

Nid Storage

302

Hazard Potential

Low

Foundations

Soil

Nid Height

57
       
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.