Margaret Lake
Margaret Lake is an earth dam located in Isanti County, Minnesota, built in 1966. It carries a Low hazard potential classification.
About Margaret Lake
Margaret Lake is a dam in Isanti, Minnesota. The dam is owned by Mndnr-wildlife (state). It impounds the Rum River-tr near St. Francis.
The dam stands 18 feet tall and stretches 20 feet across, creates a reservoir covering 115 acres, has a maximum storage capacity of 2,040 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1966, 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 06/06/2024.
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Location
| State | Minnesota |
| County | Isanti |
| Nearest City | St. Francis |
| River/Stream | Rum River-tr |
| Coordinates | 45.45833, -93.30335 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 20 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 2,040 acre-ft |
| Max Storage | 2,040 acre-ft |
| Normal Storage | 1,000 acre-ft |
| Surface Area | 115 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 20 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | MNDNR-Wildlife |
| Owner Type | State |
| Hazard Classification | Low |
| Last Inspection | 06/06/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00475 |
| Federal ID | MN00475 |
| More Info | State Dam Safety Program |