Coon Rapids is a gravity dam located in Anoka County, Minnesota, built in 1913. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 2,008 ft long, taller than 80% 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 concrete gravity section and the water level is illustrative.
About Coon Rapids
The primary purpose of Coon Rapids is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Three Rivers Park District (local government). It impounds the Mississippi River near Coon Rapids.
The dam stands 35 feet tall and stretches 2,008 feet across, creates a reservoir covering 160 acres, has a maximum storage capacity of 2,000 acre-feet, and collects water from a drainage area of 19,219 square miles. Completed in 1913, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 05/13/2022.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Minnesota |
| County | Anoka |
| Nearest City | Coon Rapids |
| River/Stream | Mississippi River |
| Coordinates | 45.14446, -93.31060 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 35 ft |
| Dam Height | 30 ft |
| Dam Length | 2,008 ft |
| Year Completed | 1913 (113 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 2,000 acre-ft |
| Normal Storage | 1,380 acre-ft |
| Surface Area | 160 acres |
| Drainage Area | 19,219 sq mi |
| Max Discharge | 130,000 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Three Rivers Park District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/13/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MN00507 |
| Federal ID | MN00507 |
| More Info | State Dam Safety Program |