Little Cache Creek No. 1 is an earth dam located in Johnson County, Illinois, built in 1974. It carries a Significant hazard potential classification.
Dam profile
NID height · 58 ft58 ft tall and 550 ft long, taller than 95% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Little Cache Creek No. 1
The primary purpose of Little Cache Creek No. 1 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Usda Fs (federal). It impounds the Little Cache Creek.
The dam stands 58 feet tall and stretches 550 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 2,000 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1974, the structure is well into its service life at over 50 years old.
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 08/14/2015. That was over 11 years ago.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Illinois |
| County | Johnson |
| Nearest City | None |
| River/Stream | Little Cache Creek |
| Coordinates | 37.49312, -88.87221 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 48 ft |
| Dam Length | 550 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 2,000 acre-ft |
| Normal Storage | 1,650 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,509 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 08/14/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL00037 |
| Federal ID | IL00037 |
| More Info | State Dam Safety Program |