Lower Chilson Pond Dam
Lower Chilson Pond Dam is an earth dam located in Livingston County, Michigan, built in 1961. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lower Chilson Pond Dam
The primary purpose of Lower Chilson Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mdnr Parks & Recreation (state). It impounds the Chilson Creek near South Lyon.
The dam stands 11 feet tall and stretches 241 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 410 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1961, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/04/2019.
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Location
| State | Michigan |
| County | Livingston |
| Nearest City | South Lyon |
| River/Stream | Chilson Creek |
| Coordinates | 42.50686, -83.86084 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 241 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 410 acre-ft |
| Max Storage | 410 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 260 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MDNR Parks & Recreation |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/04/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00757 |
| Federal ID | MI00757 |
| More Info | State Dam Safety Program |