Kankakee Reservoir Report

Last Updated: December 5, 2025

Located in Kankakee, Illinois, the Kankakee River dam stands as a testament to the intersection of water resource management and climate considerations.


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Summary

Built in 1915, this concrete structure serves multiple purposes, including hydroelectric power generation and recreation. Its low hazard potential is complemented by a very high risk assessment ranking, highlighting the importance of ongoing monitoring and maintenance.

Managed by the Federal Energy Regulatory Commission and regulated by the Illinois Department of Natural Resources, the Kankakee River dam is a key feature in the local landscape. With a height of 10 feet and a hydraulic height of 15 feet, this gravity dam spans 440 feet in length and provides a storage capacity of 2400 acre-feet. The controlled spillway, measuring 440 feet in width, ensures effective water release during periods of high flow, contributing to flood control efforts in the region.

As a recreational hub and vital water management structure, the Kankakee River dam serves as a focal point for environmental stewardship and public enjoyment. While its condition assessment is currently not available, the dam's historical significance and ongoing operational relevance underscore the need for continued investment in its upkeep and safety. Climate enthusiasts and water resource advocates alike can appreciate the complex interplay of infrastructure, regulation, and natural forces embodied by the Kankakee River dam.

Year Completed

1915

Dam Length

440

Dam Height

10

River Or Stream

Kankakee River

Primary Dam Type

Concrete

Surface Area

300

Hydraulic Height

15

Drainage Area

4400

Nid Storage

2400

Structural Height

12

Hazard Potential

Low

Foundations

Soil

Nid Height

15
       
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.