Vandalia Wastewater Treatment Lagoon is an earth dam located in Fayette County, Illinois, built in 1986. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 4,000 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Vandalia Wastewater Treatment Lagoon
Vandalia Wastewater Treatment Lagoon is a dam in Fayette, Illinois. The dam is owned by City of Vandalia (local government). It impounds the Kaskaskia River near Vandalia.
The dam stands 16 feet tall and stretches 4,000 feet across, and has a maximum storage capacity of 300 acre-feet. Completed in 1986, the structure is 40 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 06/05/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Fayette |
| Nearest City | Vandalia |
| River/Stream | Kaskaskia River |
| Coordinates | 38.99099, -89.09426 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 4,000 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | City of Vandalia |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/05/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50084 |
| Federal ID | IL50084 |
| More Info | State Dam Safety Program |