Little Rainbow Lake Dam is an earth dam located in Gratiot County, Michigan, built in 1972. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 33 ft33 ft tall and 600 ft long, taller than 76% of U.S. dams with a recorded height. 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 Little Rainbow Lake Dam
The primary purpose of Little Rainbow Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Rainbow Lake Mainenance Corporation (private). It impounds the Tributary to Pine Creek near Maple Rapids.
The dam stands 33 feet tall and stretches 600 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 305 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, 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 12/30/2019.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Michigan |
| County | Gratiot |
| Nearest City | Maple Rapids |
| River/Stream | Tributary to Pine Creek |
| Coordinates | 43.15000, -84.69667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 600 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 305 acre-ft |
| Max Storage | 305 acre-ft |
| Normal Storage | 231 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 250 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Rainbow Lake Mainenance Corporation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/30/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00440 |
| Federal ID | MI00440 |
| More Info | State Dam Safety Program |