Willow Wood Lake Dam is an earth dam located in St. Clair County, Illinois, built in 2003. It carries a Low hazard potential classification.
Dam profile
NID height · 36 ft36 ft tall and 580 ft long, taller than 82% of U.S. dams with a recorded height. 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 Willow Wood Lake Dam
The primary purpose of Willow Wood Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Willowwood Lake Steering Committee (private). It impounds the Trib West Fork Richland Creek near Smithton.
The dam stands 36 feet tall and stretches 580 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 214 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2003, the structure is relatively new.
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 11/19/2020.
At 36 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Illinois |
| County | St. Clair |
| Nearest City | Smithton |
| River/Stream | Trib West Fork Richland Creek |
| Coordinates | 38.37695, -90.00304 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 580 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 214 acre-ft |
| Max Storage | 214 acre-ft |
| Normal Storage | 141 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 59 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Willowwood Lake Steering Committee |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/19/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50465 |
| Federal ID | IL50465 |
| More Info | State Dam Safety Program |