St. Louis River
St. Louis River is a gravity dam located in St. Louis County, Minnesota, built in 1963. It carries a Low hazard potential classification.
About St. Louis River
The primary purpose of St. Louis River is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Oglebay Norton Co (private). It impounds the St. Louis River near Forbes.
The dam stands 28 feet tall and stretches 126 feet across, has a maximum storage capacity of 2,000 acre-feet, and collects water from a drainage area of 715 square miles. Completed in 1963, 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 10/05/2023.
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Location
| State | Minnesota |
| County | St. Louis |
| Nearest City | Forbes |
| River/Stream | St. Louis River |
| Coordinates | 47.37208, -92.57602 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 28 ft |
| Dam Height | 19 ft |
| Dam Length | 126 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 2,000 acre-ft |
| Normal Storage | 600 acre-ft |
| Drainage Area | 715 sq mi |
| Max Discharge | 26,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Oglebay Norton Co |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 10/05/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00094 |
| Federal ID | MN00094 |
| More Info | State Dam Safety Program |