Lake Dubonnet Dam
Lake Dubonnet Dam is an earth dam located in Grand Traverse County, Michigan, built in 1956. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lake Dubonnet Dam
The primary purpose of Lake Dubonnet Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mdnr Fisheries (state). It impounds the Platte River near Lake Ann.
The dam stands 13 feet tall and stretches 450 feet across, creates a reservoir covering 645 acres, has a maximum storage capacity of 3,170 acre-feet, and collects water from a drainage area of 28 square miles. Completed in 1956, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/14/2015. That was over 10 years ago.
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Location
| State | Michigan |
| County | Grand Traverse |
| Nearest City | Lake Ann |
| River/Stream | Platte River |
| Coordinates | 44.68368, -85.80763 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 450 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 3,170 acre-ft |
| Max Storage | 3,170 acre-ft |
| Normal Storage | 1,935 acre-ft |
| Surface Area | 645 acres |
| Drainage Area | 28 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MDNR Fisheries |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/14/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00762 |
| Federal ID | MI00762 |
| More Info | State Dam Safety Program |