Grass Lake is an earth dam located in Cass County, Minnesota, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 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 Grass Lake
The primary purpose of Grass Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the Tr-mississippi River.
The dam stands 8 feet tall and stretches 350 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 135 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1970, 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 07/24/2019.
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Location
| State | Minnesota |
| County | Cass |
| Nearest City | None |
| River/Stream | Tr-mississippi River |
| Coordinates | 47.37579, -94.38796 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 5 ft |
| Dam Length | 350 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 135 acre-ft |
| Max Storage | 135 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 7 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/24/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01830 |
| Federal ID | MN01830 |
| More Info | State Dam Safety Program |