Erie Basin 1

Embarrass River-TR· St. Louis, Minnesota· Built 1978· Earth· 200 ft tall
Significant Hazard Tailings Private

Physical Details

Dam Height 200 ft (taller than 99.7% in MN)
Dam Length13,600 ft
Dam TypeEarth
Max Storage35.6K acre-ft
Normal Storage10.3K acre-ft
Drainage Area2 sq mi
Max Discharge100 cfs
Year Completed1978 (48 years old)
NID IDMN00663

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities

Emergency Action Plan: No
Last Inspection: October 5, 2022
State Regulated: Yes
Regulatory Agency: MNDNR EWR

Ownership

Poly Met Mining, Inc.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Erie Basin 1?

Erie Basin 1 is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Who owns Erie Basin 1?

Erie Basin 1 is owned by Poly Met Mining, Inc. (Private).

When was Erie Basin 1 last inspected?

Erie Basin 1 was last inspected on October 5, 2022.

When was Erie Basin 1 built?

Erie Basin 1 was completed in 1978, making it 48 years old.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.