Amalga mine seeks to lower cost, impact by shipping gold from Cascade Point elsewhere for processing, company official says
- Mark Sabbatini
- 4 hours ago
- 6 min read
Grande Portage projects 277 jobs, $1B net present value during initial seven-year lifespan of proposed mine north of Juneau
By Mark Sabbatini
Juneau Independent
A proposed new gold mine north of Juneau expects to create 277 jobs and a pre-tax net present value of nearly $1 billion during an initial seven-year production cycle, a representative of the company developing the project told Juneau business leaders Thursday.
The New Amalga Gold Project, located near Herbert Glacier about 20 miles north of downtown Juneau, is intended to be a low-impact site where employees will commute to work daily from Juneau and ore will be shipped elsewhere for processing, said Graham Neale, director of corporate and external communications at Grande Portage Resources Ltd., during a presentation to the Greater Juneau Chamber of Commerce.
The tentative plan is to drive truckloads of ore to a terminal at Cascade Point, about 10 miles further north, about once an hour, with a ship picking up and transporting stockpiles weekly, he said. Plans for the mine, which doesn't yet have an opening target date, have been in the works for more than a decade.
"They've really been exploring it for the last 12 years or so, intentionally keeping a low profile, just because that's what you do in exploration," Neale said. "You want to make sure that you have something to talk about before you start talking about it.”
Attention to the mine — and controversy about it — have grown during the past year due to the Dunleavy administration’s strong advocacy for putting a state ferry terminal at Cascade Point that has been strongly opposed by travelers and regional officials. The administration has already approved contracts spending nearly $30 million for infrastructure, including a road the mine could also use, prompting critics to assert that aiding the company is a primary purpose of the state’s involvement.
Neale acknowledged the questions raised about the mine’s role at Cascade Point. He said the ferry terminal and ore shipping facilities are separate projects, although his company does need a road to the site regardless of the state’s plans. State officials announced last month the first stage of work, which was scheduled this summer, is being postponed beyond this year due to permitting issues raised by the U.S. Army Corps of Engineers.
"Ultimately, if the Department of Transportation and Public Facilities doesn't build a road, Grande Portage would look at doing it themselves," he said.
Access to a site for shipping ore is key to what Grande Portage’s website calls “a low-footprint, low-initial-capital scenario” for the Amalga mine.
“When you look at the actual footprint of what would be required on surface or would be needed to support this it's roughly 50% of what you would see at a conventional underground mine site like you would see at Kensington, Greens Creek or somewhere down in Nevada,” Neale said. “That's simply because there's not going to be any processing facilities, there not going to be a need for tailings storage, the need for waste rock storage. We don't plan on building a camp. So everybody’s that's going to work at this mine, we're going to get them home at the end of every shift. That's the plan right now.”
A preliminary economic assessment published April 15 by Grande Portage states containers of ore will be "loaded onto barges for transport to deepwater port facilities in British Columbia, where the containers would be emptied and the material loaded onto trans-oceanic bulk vessels for overseas processing. Empty containers would be returned to the minesite on the back-haul for reuse."
A map presented Thursday shows the company is planning for a 3.25-mile access road from Glacier Highway to a maintenance and materials storage area, with another road extending about a mile to the portal area accessing the underground mine. The mine as currently designed features a network of extraction areas and tunnels extending up to 1,200 feet beneath the surface.
Among Grande Portage’s plans for this year, according to a press release issued Tuesday:
• About 4,300 meters of diamond drilling from up to 14 drillholes to conduct surface mapping and trench sampling, which "will characterize the geotechnical and hydrogeological aspects of the deposit rock mass in order (to) gather data necessary for the environmental review and permitting process as well as to inform mine development plans. "
• Construction of environmental monitoring infrastructure, including meteorological stations and stream monitoring equipment.
• Preparations for initial work on a site access road, pending state approval.
• Conducting baseline studies necessary for the environmental review and permitting process, "including wildlife and avian surveys, wetlands surveys, ongoing surface water sampling, cultural and archeological surveys, geochemical studies, socioeconomic studies, and more."
As of now the Amalga mine appears comparable in size and mineral grade to the Kensington mine about 20 miles further north that began production in 2010, Neale said. The Kensington mine surpassed 1 million ounces of gold produced in 2019 and in 2025 produced more than 106,000 ounces, according to owner Coeur Alaska Inc.
Grande Portage’s preliminary economic assessment projects shipping 1.05 million ounces of gold during the initial seven-year production cycle. The company’s webpage for the project, citing a mineral resource estimate from June of 2024, states there is an “indicated resource” of about 2 million ounces of gold and nearly 1.4 million ounces of silver.
The company expects to spend more than $500 million for capital projects, including $254.8 million prior to beginning production, and to make a profit quickly by recovering its capital costs slightly more than a year after operations begin, according to Neale’s presentation.
Other mines in the area are seeing their operational years extended, with Coeur Alaska last year announcing a five-year extension until 2029 and the Hecla Greens Creek Mine getting approval in 2024 for an expansion that could extend its life 18 years. Neale said that is a possibility with the Amalga project, but it’s not known how likely or how long an extension might be.
"Greens Creek started in 1989 with a nine-year mine life and Kensington started in 2011 with a 10-year mine life, and they're both still going,” he said. “So that's just the type of deposits that these are. It's like driving in the dark. You just keep going until the resources tell you you can’t.”
Grande Portage projects it will pay about $340 million in federal, state and local taxes, plus $134 million in royalties during the initial seven-year operating window, according to Neale’s presentation.
The company also expects a $979 million pre-tax net present value ($721 million post-tax) on a base gold price of $3,200 an ounce, but those predictions based on production and price have a significant degree of uncertainty. The pre-tax value could exceed $2.1 billion at the recent average spot price of $5,000 an ounce, and have a negative value at $1,600 an ounce.
Among the questions Neale was asked during his presentation to the chamber is the impact the mine road and surface infrastructure will have on recreational use of the area. Much of a planned mine access road follows a roughly parallel path to the Herbert Glacier Trail, for instance, and questions about the mine’s presence were raised when the U.S. Forest Service announced earlier this year a recreational cabin planned in the area is being put on hold.
He said the design of the mine site, which as of now is at about a 50% level of confidence, attempts to use natural features to shield much of the infrastructure from areas where recreational users will be such as the trail.
"That location has been initially assessed for the amount of flat land that is available, minimizing wetlands disturbance, and also the greatest viewshed that we can get from the Herbert river trail, and the viewpoint and the glacier itself," he said. "So again, this is a preliminary assessment. This may not be the final, may not even be close to the final, but this is where if you look at the project right now from a 50% level this is what makes the most sense."
• Contact Mark Sabbatini at editor@juneauindependent.com or (907) 957-2306.
