Harrell Lake North Dam Reservoir Report
Last Updated: December 19, 2025
Harrell Lake North Dam, located in Adams County, Illinois, is a privately owned structure primarily used for recreation.
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Summary
The dam, completed in 1965, is an earth dam with a height of 22 feet and a length of 780 feet. It has a storage capacity of 186 acre-feet and a normal storage level of 128 acre-feet. The dam is regulated by the Illinois Department of Natural Resources and is subject to regular inspections to ensure its safety and compliance with state regulations.
Despite being classified as having a low hazard potential, Harrell Lake North Dam is still considered to have a moderate risk level. The dam features an uncontrolled spillway with a width of 26 feet. The last inspection of the dam was conducted in September 2013, with a recommended inspection frequency of every five years. While the condition assessment of the dam is not currently available, measures are in place to manage potential risks associated with the structure.
With its scenic location and recreational purpose, Harrell Lake North Dam is an important feature in the local landscape. The dam, situated along the TRIB FIGLEY BRANCH and MCKEE CREEK, provides opportunities for water-based activities and outdoor enjoyment for residents and visitors alike. As efforts continue to manage and maintain the dam, it serves as a vital resource for water conservation and climate enthusiasts to appreciate and protect.
Year Completed |
1965 |
Dam Length |
780 |
Dam Height |
22 |
River Or Stream |
TRIB FIGLEY BRANCH,MCKEE CREEK |
Primary Dam Type |
Earth |
Nid Storage |
186 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bear Creek Near Marcelline
|
5cfs |
La Moine River At Ripley
|
33cfs |
La Moine River At Colmar
|
17cfs |
North River At Palmyra
|
15cfs |
South Fabius River Near Taylor
|
12cfs |
Bear Creek At Hannibal
|
2cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Harrell Lake North Dam