Triangle Lake Dam
Triangle Lake Dam is an earth dam located in Adams County, Illinois, built in 2000. It carries a Low hazard potential classification.
About Triangle Lake Dam
The primary purpose of Triangle Lake Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Illinois Department Of Natural Resources (state). It impounds the Frazier Creek near Quincy.
The dam stands 18 feet tall and stretches 8,500 feet across, creates a reservoir covering 250 acres, has a maximum storage capacity of 2,757 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 2000, the structure is 26 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 08/17/2021.
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Location
| State | Illinois |
| County | Adams |
| Nearest City | Quincy |
| River/Stream | Frazier Creek |
| Coordinates | 39.97201, -91.43107 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 8,500 ft |
| Year Completed | 2000 (26 years old) |
Storage & Hydraulics
| NID Storage | 2,757 acre-ft |
| Max Storage | 2,757 acre-ft |
| Surface Area | 250 acres |
| Drainage Area | 17 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 08/17/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50412 |
| Federal ID | IL50412 |
| More Info | State Dam Safety Program |