Williams Mill Dam is an earth dam located in Allegan County, Michigan, built in 1870. It carries a Low hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 200 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 Williams Mill Dam
The primary purpose of Williams Mill Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by I & L Williams (private). It impounds the Mill Creek near Otsego.
The dam stands 17 feet tall and stretches 200 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 70 acre-feet. Completed in 1870, the structure is one of the older dams in the region, with over a century and a half of service.
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 | Allegan |
| Nearest City | Otsego |
| River/Stream | Mill Creek |
| Coordinates | 42.43333, -85.74333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 200 ft |
| Year Completed | 1870 (156 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 760 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | I & L Williams |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1901 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00007 |
| Federal ID | MI00007 |
| More Info | State Dam Safety Program |