Rush Lake Level Control Structure is an earth dam located in Montmorency County, Michigan, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 350 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 Rush Lake Level Control Structure
The primary purpose of Rush Lake Level Control Structure is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Montmorency Co. Drain Commissioner (private). It impounds the N Br Thunder Bay River near Alpena.
The dam stands 19 feet tall and stretches 350 feet across, creates a reservoir covering 355 acres, and has a maximum storage capacity of 5,025 acre-feet. 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. The most recent inspection on record was 09/13/2018.
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Location
| State | Michigan |
| County | Montmorency |
| Nearest City | Alpena |
| River/Stream | N Br Thunder Bay River |
| Coordinates | 45.14667, -84.07000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 350 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 5,025 acre-ft |
| Max Storage | 5,025 acre-ft |
| Normal Storage | 2,250 acre-ft |
| Surface Area | 355 acres |
| Max Discharge | 106 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Montmorency Co. Drain Commissioner |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/13/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00225 |
| Federal ID | MI00225 |
| More Info | State Dam Safety Program |