Northshore Mining Fined $19K for 11 Wastewater Releases Near Silver Bay

Northshore Mining, the Silver Bay iron ore operation run by Cleveland-Cliffs, was fined $19,000 by the Minnesota Pollution Control Agency after investigators documented 11 unpermitted wastewater releases between 2023 and 2025, including a single discharge of nearly 400,000 gallons of recycled water that the company said may have reached the Beaver River.

The MPCA found that Northshore released recycled water to the ground seven times and water related to mining processes four additional times, all in violation of the facility's wastewater permit. The company attributed each of the 11 releases to equipment failure.

Beyond the monetary penalty, the MPCA ordered Northshore to replace 8,000 feet of pipeline identified as the source of most releases by Dec. 31, 2026, submit a spill prevention report detailing steps taken to prevent future unauthorized discharges from equipment failure, and implement a piping integrity plan. WDIO and KQDS reported the replacement window runs from Jan. 1, 2025, through Dec. 31, 2026.

Cleveland-Cliffs released a statement on behalf of Northshore Mining that said the company has "completed a comprehensive spill prevention plan and has implemented a piping integrity program" and is "actively progressing on replacing 8,000 feet of pipeline," with 3,700 feet already finished in 2025. "Northshore Mining acknowledges the Minnesota Pollution Control Agency's findings and takes these matters seriously," the statement read. "Northshore Mining is currently in compliance with its permit."

The potential reach of the largest release into the Beaver River, a northeastern Minnesota waterway, remains an open question. No water quality sampling results or monitoring data were included in the MPCA's announcement, and the agency's language was cautious: Northshore Mining itself reported that only "a small amount" of recycled water may have reached the river.

The $19,000 penalty reflects the MPCA's standard calculation, which weighs the seriousness of environmental harm, the repeated nature of the violations, and any economic benefit the company gained by delaying compliance. "When facilities do not fully comply with regulatory requirements, the resulting pollution can be harmful to people and the environment," the agency said in its press release.

With 3,700 feet of the required 8,000-foot pipeline replacement already completed, Northshore faces a year-end deadline to finish the remaining work while the MPCA tracks its compliance going forward.