Armstrong No 2 Dam is an earth dam located in Chippewa County, Michigan, built in 1954. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 490 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 Armstrong No 2 Dam
The primary purpose of Armstrong No 2 Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nathaniel Armstrong (private). It impounds the School Creek.
The dam stands 12 feet tall and stretches 490 feet across, creates a reservoir covering 33 acres, and has a maximum storage capacity of 430 acre-feet. Completed in 1954, 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 01/01/1901. That was over 125 years ago.
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Location
| State | Michigan |
| County | Chippewa |
| Nearest City | None |
| River/Stream | School Creek |
| Coordinates | 46.30167, -84.31333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 490 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 430 acre-ft |
| Max Storage | 430 acre-ft |
| Normal Storage | 160 acre-ft |
| Surface Area | 33 acres |
| Max Discharge | 120 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nathaniel Armstrong |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1901 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00493 |
| Federal ID | MI00493 |
| More Info | State Dam Safety Program |