Jocko Creek Dam is an earth dam located in Mackinac County, Michigan, built in 1957. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 240 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 Jocko Creek Dam
The primary purpose of Jocko Creek Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Hiawatha Sportsmen's Club (private). It impounds the Jocko Creek near Millecoquins.
The dam stands 13 feet tall and stretches 240 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 56 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1957, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 10/12/2018.
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Location
| State | Michigan |
| County | Mackinac |
| Nearest City | Millecoquins |
| River/Stream | Jocko Creek |
| Coordinates | 46.19833, -85.50000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 240 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 56 acre-ft |
| Max Storage | 56 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Hiawatha Sportsmen's Club |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/12/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI01493 |
| Federal ID | MI01493 |
| More Info | State Dam Safety Program |