Mcgraw Lake Dam is an earth dam located in St. Clair County, Illinois, built in 1927. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 270 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 Mcgraw Lake Dam
The primary purpose of Mcgraw Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by L. Mcgraw (private). It impounds the Trib Silver Creek near New Athens.
The dam stands 12 feet tall and stretches 270 feet across, and has a maximum storage capacity of 54 acre-feet. Completed in 1927, the structure is well-established, with more than 75 years of service.
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 04/26/2019.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | St. Clair |
| Nearest City | New Athens |
| River/Stream | Trib Silver Creek |
| Coordinates | 38.41021, -89.88256 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 270 ft |
| Year Completed | 1927 (99 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 29 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | L. Mcgraw |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/26/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00800 |
| Federal ID | IL00800 |
| More Info | State Dam Safety Program |