Theilen Pond Dam 1
Theilen Pond Dam 1 is an earth dam located in Sangamon County, Illinois, built in 1977. It carries a Low hazard potential classification.
About Theilen Pond Dam 1
Theilen Pond Dam 1 is a dam in Sangamon, Illinois. The dam is owned by Fred Theilen;fred Theilen (private). It impounds the Tr- Lick Creek near Springfield.
The dam stands 21 feet tall and stretches 400 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 81 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1977, the structure is 49 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 08/05/2025.
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Location
| State | Illinois |
| County | Sangamon |
| Nearest City | Springfield |
| River/Stream | Tr- Lick Creek |
| Coordinates | 39.71845, -89.74509 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 400 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 81 acre-ft |
| Max Storage | 81 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | FRED THEILEN;FRED THEILEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 08/05/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL40142 |
| Federal ID | IL40142 |
| More Info | State Dam Safety Program |