Fennell Pond Dam Reservoir Report

Last Updated: December 20, 2025

Fennell Pond Dam, located in Pike County, Illinois, was completed in 1972 under the design of the USDA NRCS.


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Summary

This private dam serves multiple purposes including fire protection, stock, small fish pond, and recreation. With a height of 31 feet and a length of 237 feet, the dam has a normal storage capacity of 63 acre-feet and a maximum storage capacity of 99 acre-feet. The dam is situated on the East Branch of the Rock Island District, with a drainage area of 0.16 square miles.

The dam features an uncontrolled spillway with a width of 26 feet and an outlet gate that is also uncontrolled. The last inspection of the dam took place in June 2017, with a moderate risk assessment rating of 3. While the hazard potential of the dam is currently undetermined, it is regulated by the Illinois Department of Natural Resources and undergoes regular state inspection, permitting, and enforcement. With its location in a picturesque setting, water resource and climate enthusiasts can appreciate the role of Fennell Pond Dam in providing essential water management and recreational opportunities in the region.

Year Completed

1972

Dam Length

237

Dam Height

31

River Or Stream

EAST BRANCH

Primary Dam Type

Earth

Surface Area

7

Drainage Area

0.16

Nid Storage

99

Outlet Gates

Uncontrolled

Hazard Potential

Undetermined

Foundations

Soil

Nid Height

31
       
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.