Grand River Marsh
Grand River Marsh is an earth dam located in Marquette County, Wisconsin, built in 1969. It carries a Low hazard potential classification and has a fair condition assessment.
About Grand River Marsh
Grand River Marsh is a dam in Marquette, Wisconsin. The dam is owned by Wisconsin Department Of Natural Resources (state). It impounds the Grand River.
The dam stands 16 feet tall and stretches 5,200 feet across, creates a reservoir covering 2,500 acres, has a maximum storage capacity of 22,000 acre-feet, and collects water from a drainage area of 184 square miles. Completed in 1969, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 11/08/2016.
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Location
| State | Wisconsin |
| County | Marquette |
| Nearest City | None |
| River/Stream | Grand River |
| Coordinates | 43.72841, -89.26098 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 5,200 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 22,000 acre-ft |
| Max Storage | 22,000 acre-ft |
| Normal Storage | 4,000 acre-ft |
| Surface Area | 2,500 acres |
| Drainage Area | 184 sq mi |
| Max Discharge | 9,580 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 11/08/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00877 |
| Federal ID | WI00877 |
| More Info | State Dam Safety Program |