Spencer Dam is an earth dam located in Lenawee County, Michigan, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 500 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 Spencer Dam
The primary purpose of Spencer Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Norman Spencer (private). It impounds the Tributary to Posey Lake near Hudson.
The dam stands 20 feet tall and stretches 500 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 110 acre-feet. Completed in 1975, the structure is well into its service life at over 50 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 11/02/1981. That was over 44 years ago.
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Location
| State | Michigan |
| County | Lenawee |
| Nearest City | Hudson |
| River/Stream | Tributary to Posey Lake |
| Coordinates | 41.92504, -84.28433 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 500 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 110 acre-ft |
| Max Storage | 110 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Norman Spencer |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/02/1981 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00734 |
| Federal ID | MI00734 |
| More Info | State Dam Safety Program |