The Tailing Treatment Facility and Upper Slate Lake at the Kensington Mine on Monday, Oct. 14, 2019. Coeur Alaska wants to expand the life of the mine which will require expanding this lake which holds processed material from the mine. The lake has its own water treatment plant which continually processes wastewater. The company says it follows the strictest environmental precautions. (Peter Segall / Juneau Empire)

The Tailing Treatment Facility and Upper Slate Lake at the Kensington Mine on Monday, Oct. 14, 2019. Coeur Alaska wants to expand the life of the mine which will require expanding this lake which holds processed material from the mine. The lake has its own water treatment plant which continually processes wastewater. The company says it follows the strictest environmental precautions. (Peter Segall / Juneau Empire)

Comment period opens for proposed mine operations extension

Expanding the life of the mine means expanding facilities

The Tongass National Forest is seeking the public’s input on a proposed expansion of operations at the Kensington Gold Mine located north of Juneau, the U.S. Forest Service announced Friday.

The Kensington Gold Mine, operated by Coeur Alaska Inc., is an underground gold mine on a mix of patented land and the Tongass National Forest, the Forest Service said in a news release. It has been in production since late June 2010. Kensington provides approximately 387 jobs in Juneau and Southeast Alaska, the release said.

Coeur Alaska Inc. is requesting an operations plan amendment for additional tailings, waste rock disposal and related infrastructure at the mine, the U.S. Forest Service said in a news release. A 45-day public comment period on the supplemental environmental impact statement, which considers the proposed changes to the Plan of Operations, begins on Oct. 30 and will remain open until Dec. 14.

[Digging into Kensington Gold Mine]

The proposed additions would extend the life of the mine. The current predicted life of the Kensington mine currently ends in 2023, according to the Forest Service. Activities under the proposed Plan of Operations Amendment will add 10 years to the expected mine life to 2033.

“The Forest Service recognizes the importance of mineral resources and encourages safe, responsible mineral exploration and development as part of our multiple-use mandate,” said Brad Orr, Juneau District Ranger, in the release. “We are working with Coeur Alaska to analyze potential impacts of their proposed extension of operations for the mine, and public input is an important part of the analysis.”

Workers inside the Kensington Gold Mine on Monday, Oct. 14, 2019. Kensington began its operations in 2010 after a prolonged legal battle over the Tailing Treatment Facility which environmentalists say is a threat to fish habitats. (Peter Segall / Juneau Empire)

Workers inside the Kensington Gold Mine on Monday, Oct. 14, 2019. Kensington began its operations in 2010 after a prolonged legal battle over the Tailing Treatment Facility which environmentalists say is a threat to fish habitats. (Peter Segall / Juneau Empire)

Forest Service experts will work toward minimizing the impacts of mining activities on other forest resources by working closely with the state and other federal agencies with regulatory authority to ensure that measures are in place to protect water quality and nearby aquatic habitats, according to the Forest Service.

Earlier this month the Forest Service began a public comment period on a proposed expansion of the Hecla Greens Creek Mine on Admiralty Island, which is looking to expand its tailings and waste rock facilities as well.

[Coeur Alaska to expand Kensington operations]

According to the release, public comments submitted during this period will be considered and responded to in the Final Environmental Impact Statement and used to help finalize the Draft Decision. Project information, meeting announcements, legal notices, and documents are posted on the project web page at: https://www.fs.usda.gov/project/?project=55533.

Virtual public meetings will be scheduled in Juneau and Haines, the Forest Service said, but did not give dates.

Comments can be submitted several ways:

• Electronically at: https://www.fs.usda.gov/project/?project=55533

• Email to sm.fs.kensington@usda.gov

• Fax to 907-586-8808.

• Mail to 8510 Mendenhall Loop Rd, Juneau AK 99801; attention Kensington Mine Plan Amendment

More in News

A Capital City Fire/Rescue truck drives in the Mendenhall Valley in 2023. (Clarise Larson / Juneau Empire file photo)
Juneau man found dead following residential fire

The cause of the fire is still under investigation.

CBJ sign reads “Woodstove burn ban in effect.” (City and Borough of Juneau photo)
Update: CBJ cancels air quality emergency in Mendenhall Valley Sunday morning

The poor air quality was caused by an air inversion, trapping pollutants at lower elevations.

A dusting of snow covers the Ptarmigan chairlift at Eaglecrest Ski Area in December 2024. (Eaglecrest Ski Area photo)
Update: Waterline break forces closure at Eaglecrest Friday, Saturday

The break is the latest hurdle in a challenging opening for Juneau’s city-run ski area this season.

Patrick Sullivan stands by an acid seep on July 15,2023. Sullivan is part of a team of scientists who tested water quality in Kobuk Valley National Park’s Salmon River and its tributaries, where permafrost thaw has caused acid rock drainage. The process is releasing metals that have turned the waters a rusty color. A chapter in the 2025 Arctic Report Card described “rusting rivers” phenomenon. (Photo by Roman Dial/Alaska Pacific University)
Ecosystem shifts, glacial flooding and ‘rusting rivers’ among Alaska impacts in Arctic report

NOAA’s 2025 report comes despite Trump administration cuts to climate science research and projects

The U.S. Capitol in Washington, D.C., on Oct. 1, 2025. (Photo by Jennifer Shutt/States Newsroom)
Moderate US House Republicans join Dems to force vote on extension of health care subsidies

WASHINGTON — Republican leaders in the U.S. House will face a floor… Continue reading

The National Weather Service Juneau issues a high wind warning forDowntown Juneau, Southern Douglas Island and Thane due to increased confidence for Taku Winds this afternoon. (National Weather Service screenshot)
Taku winds and dangerous chills forecast for Juneau

Gusts up to 60 mph and wind chills near minus 15 expected through the weekend.

Chloe Anderson for the Juneau Empire
Fallen trees are pictured by the Mendenhall river on Aug. 15, 2025. Water levels rose by a record-breaking 16.65 feet on the morning of Aug. 13 during a glacial outburst flood.
Lake tap chosen as long-term fix for glacial outburst floods

The U.S. Army Corps of Engineers and Juneau leaders agreed on the plan.

Gift card displays, such as this one in a CVS in Harlem, N.Y., have been a source of concerns for lawmakers hoping to combat gift card fraud. “Card draining,” or stealing numbers from poorly packaged cards, is one of the costliest and most common consumer scams, and states are trying to combat it with consumer alerts, arrests and warning signs on store displays. (Photo by Robbie Sequeira/Stateline)
Alaskans targeted by scammers posing as government officials, FBI warns

The FBI reports Alaskans lost over $26.2 million to internet-based scams in 2024, with $1.3 million of those losses due to government impersonation scams

A buck enters the view of an Alaska Department of Fish and Game trail camera on Douglas island in November 2020. (Alaska Department of Fish and Game courtesy photo)
Douglas deer: The island’s hunt faces calls for new rules

Board of Game is seeking public comment on regulation changes that would affect Juneau.

Most Read