Arenas Dam
Arenas Dam is an earth dam located in St. Clair County, Illinois, built in 1950. It carries a Significant hazard potential classification.
About Arenas Dam
The primary purpose of Arenas Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Joan Arenas (private). It impounds the Trib Wolf Branch near Belleville.
The dam stands 20 feet tall and stretches 300 feet across, and has a maximum storage capacity of 200 acre-feet. Completed in 1950, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 06/06/2018.
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Location
| State | Illinois |
| County | St. Clair |
| Nearest City | Belleville |
| River/Stream | Trib Wolf Branch |
| Coordinates | 38.55854, -89.98515 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 300 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 200 acre-ft |
| Max Storage | 200 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | JOAN ARENAS |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 06/06/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50085 |
| Federal ID | IL50085 |
| More Info | State Dam Safety Program |