Hagen Slurry Impoundment Dams Reservoir Report
Last Updated: December 19, 2025
The Hagen Slurry Impoundment Dams, also known as External Plugs Ep-4 & Ep-5, are privately owned structures located in Fulton County, Illinois.
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Summary
These earth dams were designed by MIDLAND COAL CO. and completed in 1983. With a height of 30 feet and a length of 2500 feet, these dams serve a primary purpose of "Other" and have a storage capacity of 535 acre-feet.
The Hagen Slurry Impoundment Dams are regulated by the Illinois Department of Natural Resources (IDNR) and undergo regular inspections, with the last inspection date recorded in December 2001. Despite being classified as having a low hazard potential, these dams are considered to have a high risk level. While the condition assessment is listed as "Not Available," the emergency action plan (EAP) status and risk management measures are also not provided in the available data.
Located near the tributary of Littlers Creek in MIDDLEGROVE, Illinois, these dams play a crucial role in water resource management in the area. With their unique design and purpose, they serve as a reminder of the importance of proper regulation and maintenance of dam structures to ensure the safety of surrounding communities and the environment.
Year Completed |
1983 |
Dam Length |
2500 |
Dam Height |
30 |
River Or Stream |
TRIB LITTLERS CREEK |
Primary Dam Type |
Earth |
Nid Storage |
535 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Hagen Slurry Impoundment Dams