The U.S. needs critical minerals in order to lessen dependence on China and other countries. Some mineral deposits in the U.S. have been identified but have not been developed due to environmental concerns. This is the case in Minnesota’s mining region.
Bloomberg reports:
“The Senate voted 50-49 to repeal a 2023 federal order
that prohibited mining in an area spanning more than 200,000 acres known as
Boundary Waters Canoe Area Wilderness. The proposal, passed by the House in
January, now heads to President Donald Trump, who is expected to sign it.”
The Obama administration
enacted a 20-year mining ban in the region, which the first Trump
administration reversed, but the ban was reinstated by the Biden
administration. The Twin Metals project has long been pursued by Duluth Metals Limited, which in 2010 initiated a partnership with Chilean mining
giant Antofagasta to form Twin Metals Minnesota. The last underground mine in the region closed nearly 50
years ago, in 1967.
Bloomberg notes:
“A plan submitted to regulators calls for a type of
waste storage that limits water use and the risk of spills, along with water
treatment systems and monitoring designed to protect surrounding wetlands.”
Below are some of the uses of the minerals to be mined:
The project plans to
implement a mine tailings management method known as dry stacking, which
dewaters tailings with the water being recovered and reused at the mine. One
goal of dry stacking is to prevent the generation of acids from tailings. Dry
stacking has been used successfully at mining projects in the U.S. and
especially in Canada. The project will not involve tailings ponds or dams,
which are potential sources of contamination, and there will be no risk of dam
failures. Dry stacking is considered to be the best available technology (BAT)
for preventing and mitigating environmental damage from mine
tailings.
Minnesota has the world’s
largest known undeveloped copper-nickel deposits. It also has some of the
strictest environmental standards among U.S. states. Why would we not want to
develop such a deposit? Because it is near a “wilderness area”? I would think
that having a mine in an area away from people would make it less likely to
impact people. While impacts on nature are important. I would think that they can be mitigated, especially as best available technologies are implemented.
The proposed mine plans to develop a part of the Duluth Complex in Northeastern Minnesota known as the Maturi Deposit.
The company explains the uniqueness of the Maturi Deposit
below:
“Because of the way it was formed, the minerals are more
condensed in a narrow band. This allows us to mine underground and surgically
extract the ore. In fact, about 80% of mining will occur below 1500 ft and
about 40% will occur below 2700 ft. The Maturi deposit that we’ll mine is a
contact-style mafic copper-nickel deposit. That’s different than many of the
world’s copper deposits, called porphyry deposits, which represent about 90% of
the world’s copper deposits and require open-pit mining.”
“Another point of difference: our continuing studies
show that the tailings produced (the leftover sandy material once the metals
are extracted and shipped to customers) will be non-acid generating. This is
due to the geology itself and our mining method. Also, independent research
confirms these findings.”
It will be an underground
mine instead of an open-pit mine. Most of the world’s copper is mined via open
pits. This underground mine will have a much smaller surface footprint, 85%
smaller than an open-pit mine. This deposit has been studied and pursued for
over two decades. I believe it is time to develop it. It is expected to create
750 jobs in the region, with another 1500 spinoff jobs. I don’t know why the
Democrats want to ban every mine and drilling project. I understand the desire
to prevent environmental destruction, but not developing such projects often
leads to sourcing those same in-demand minerals from sources with much lower
environmental standards, essentially outsourcing environmental impact to other
countries at a higher cost.
The Bureau of Land Management
(BLM) and U.S Forest Service (UFS) have opposed the project, and UFS reiterated
that opposition in 2023, noting the following:
“The record for the 2016 lease consent determination and
2023 withdrawal application demonstrate that development of these mineral
resources presented an unacceptable, inherent risk of serious and irreparable
harm to the BWCAW natural resources,” states the Dec. 18 letter, signed by
Regional Forester Antoine Dixon. “It has been thoroughly documented that the
proposed mineral leasing is not a compatible use within the watershed in such
proximity to the wilderness and that the forest service’s withholding of consent
to the issuance of leases…would be inconsistent with the record.”
Dixon continued: “Mineral leasing could cause changes to
terrestrial or aquatic habitat function due to surface destruction,
noise/light/air pollution, and modification of streams, lakes, or wetlands…
Changes to water quality could potentially result in adverse changes to the
biological integrity of aquatic communities and to sensitive species. This in
turn could adversely affect the wilderness character of the BWCAW, public use
and enjoyment of water and aquatic resources, and the ability of tribes to exercise
treaty rights.”
It will likely take years before
minerals are actually produced, as further regulatory hurdles are negotiated,
and it remains a concern that future political administrations will reverse
approvals or add requirements. However, the U.S. would do well to produce its
domestic minerals.
References:
US
Senate lifts mining ban in win for Chile billionaire clan. Marcelo Rochabrun
and James Attwood. Bloomberg. April 16, 2026. US
Senate lifts mining ban in win for Chile billionaire clan
Twin
Metals Minnesota. Twin Metals Minnesota
Dry
Stack Tailings Management. https___www.twin-metals.com_wp-content_uploads_2021_02_TMM-Dry-Stack-Fact-Sheet_FINAL_2.22.21.pdf
USFS
reiterates its opposition to planned Twin Metals mine Dec. 18 letter comes in
response to ongoing litigation over canceled leases. Marshall Helmberger. The
Timberjay. January 9, 2026. USFS
reiterates its opposition to planned Twin Metals mine - The Timberjay
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