Grand Ledge Dam is a gravity dam located in Eaton County, Michigan, built in 1900. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 292 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Grand Ledge Dam
The primary purpose of Grand Ledge Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Grand Ledge (local government). It impounds the Grand River near Portland.
The dam stands 8 feet tall and stretches 292 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 1,200 acre-feet, and collects water from a drainage area of 1,280 square miles. Completed in 1900, the structure is over a century 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 01/01/1901. That was over 125 years ago.
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Location
| State | Michigan |
| County | Eaton |
| Nearest City | Portland |
| River/Stream | Grand River |
| Coordinates | 42.76333, -84.76333 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 292 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Normal Storage | 1,200 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1,280 sq mi |
| Max Discharge | 9,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Grand Ledge |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1901 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00110 |
| Federal ID | MI00110 |
| More Info | State Dam Safety Program |