Coffeen Station Ash Pond 1 Dam

Coffeen Station Ash Pond 1 Dam is an earth dam located in Montgomery County, Illinois. It carries a Significant hazard potential classification.

About Coffeen Station Ash Pond 1 Dam

Coffeen Station Ash Pond 1 Dam is a dam in Montgomery, Illinois. The dam is owned by Dynegy (public utility). It impounds the Trib East Fork Shoal Cr.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 09/17/2025.

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Significant HazardNot Available ConditionEmergency Action Plan: Yes

Location

StateIllinois
CountyMontgomery
River/StreamTrib East Fork Shoal Cr
Coordinates39.06222, -89.39179

Physical Characteristics

Dam TypeEarth

Ownership & Safety

PurposeOther
OwnerDYNEGY
Owner TypePublic Utility
Hazard ClassificationSignificant
Condition AssessmentNot Available
Last Inspection09/17/2025
Emergency Action PlanYes

Identifiers

NID IDIL50722
Federal IDIL50722
More InfoState Dam Safety Program

Nearby Dams

Coffeen Power Sta. Supplemental Cooling Lake Dam 0.1 mi Significant Coffeen Station Ash Pond 2 Dam 0.3 mi Significant Coffeen Gmf Recycle Pond Dam 0.4 mi Low Coffeen Southwest Detention Pond Dam 0.7 mi Low Coffeen Gmf Gypsum Stack Dam 0.7 mi High Coffeen Station Coal Yard Pond Dam 0.9 mi Significant Rocky Ford Sportsman Club South Lake Dam 1.3 mi Significant Rocky Ford Sportsman Club North Lake Dam 1.4 mi Significant Bell Pond Dam 1 1.4 mi Low Coffeen Lake Dam 1.9 mi Significant