Tanny Armstrong Dam
Tanny Armstrong Dam is an earth dam located in Chippewa County, Michigan, built in 1978. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Tanny Armstrong Dam
The primary purpose of Tanny Armstrong Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Chippewa-ottawa Resource Authority (private). It impounds the Trib Little Munuscong River.
The dam stands 16 feet tall and stretches 1,100 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 227 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1978, the structure is 48 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/02/2019.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Chippewa |
| Nearest City | None |
| River/Stream | Trib Little Munuscong River |
| Coordinates | 46.28000, -84.33333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 227 acre-ft |
| Max Storage | 227 acre-ft |
| Normal Storage | 112 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 2 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Chippewa-Ottawa Resource Authority |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/02/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00481 |
| Federal ID | MI00481 |
| More Info | State Dam Safety Program |