Crystal Lake Dam is an earth dam located in Sangamon County, Illinois, built in 1995. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 455 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 Crystal Lake Dam
The primary purpose of Crystal Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Crystal Lake Estates Homeowners Assoc. (private). It impounds the Trib Spring Creek near Springfield.
The dam stands 18 feet tall and stretches 455 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1995, the structure is 31 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 06/27/2024.
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Location
| State | Illinois |
| County | Sangamon |
| Nearest City | Springfield |
| River/Stream | Trib Spring Creek |
| Coordinates | 39.78014, -89.89115 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 455 ft |
| Year Completed | 1995 (31 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 250 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Crystal Lake Estates Homeowners Assoc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/27/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50361 |
| Federal ID | IL50361 |
| More Info | State Dam Safety Program |