The Proposed Ambler Mine and Road–Implications For The Kobuk River Ecosystem And People.


The word Kobuk means “Big River” in the local native language.  Photo George Wuerthner 

I just returned from floating the Kobuk River in Alaska’s Brooks Range. The Kobuk headwaters are north of the Arctic Circle in the Gates of the Arctic National Park and flow west to the Bering Sea near Kotzebue, Alaska. The upper portion of the river is designated Wild and Scenic River.

Lake Selby, near the headwaters of the Kobuk River in the Gates of the Arctic National Park. The proposed road would run within a few miles of this lake. Photo George Wuerthner 

My companion, Bill Cunningham, and I chose to float the lower portion of the river from the village of Kobuk to the village of Kiana. Along the way, the river passes through the 1.7 million-acre Kobuk Valley National Park, the least visited national park in the country.

The Kobuk Valley sand dunes are among the special geological features of the Kobuk Valley National Park. Photo George Wuerthner 

I had two reasons for floating in the lower part of the river. One goal was to see what changes had occurred to the river and villages since the 1970s when I worked along the waterway surveying native allotments and later as a ranger in the Gates of the Arctic National Park.


Fireweed frames the village of Shungnak. Photo George Wuerthner 

The allotments resulted from the Alaska Native Claims Settlement Act (ANCLA), which allowed individuals to garner ownership of small tracts of land, and for villages and regional native corporations to claim land. Over 44 million acres of land (about the size of two states of Maine) were conveyed to native ownership. Today approximately 81,000 acres in the Kobuk Valley National Park is native owned or state lands.

The second reason for this trip was to understand better how a proposal to build a 211-mile road from the Pipeline Haul Road (Dalton Highway) to the Ambler Mining District would impact the entire region. The proposed road’s official name is the Ambler Mining District Industrial Access Project. While most conservationists attention is focused on keeping oil wells out of the Arctic Wildlife Refuge, the Ambler mining proposal might have a far greater reaching impact on the ecological fabric of the Brooks Range.

The slim light line to the right of the lake in the upper portion of this photo is a road that leads from the village of Kobuk to the Ambler mining district. Photo George Wuerthner 

The Ambler Mining District is north of the river and the Inuipat villages of Kobuk, Shungnak, and Ambler. The proposed road would cut across along the southern edge of the Brooks Range, including through a portion of the Gates of the Arctic National Park and Kobuk Wild and Scenic River and native village selections and Native Corporation lands.

Surveying native allotments along the Kobuk River in 1973. Photo George Wuerthner 

While I was working along the Kobuk in the 1970s, a flurry of mineral exploration occurred simultaneously. Exploratory prospecting demonstrated that this copper-lead-zinc-cobalt mineral belt extended for miles across the southern edge of the Brooks Range. By 1975, more than 10,000 mining claims covered what has become known as the Ambler Mineral Belt.

Today, the Ambler Mining Belt is the world’s largest high-grade copper deposit. With the growing need for more copper to advance electric cars and other efforts to reduce greenhouse gas emissions, interest in developing the Ambler copper deposits has grown.

However, the high cost of mining and transportation in the Arctic has consistently thwarted the development of the Ambler copper depots. Hence, the interest in linking the Ambler district with the Pipeline Haul Road would, in theory, make the development of the minerals economically viable.

The Alaska Pipeline near Coldfoot, Alaska. The proposed Ambler Road would connect to the Pipeline Haul Road and provide year round access to to the port of Valdez on Prince William Sound.  Photo George Wuerthner 

Alaska has always wanted to create a road across the southern portion of the Brooks Range as part of its long-term transportation plans. The state proposes to fund a portion of the cost of a road.

In addition, the NANA, an NW Alaska Inupiat tribal corporation, represents the people who live in NW Alaska, including the villagers along the Kobuk River. NANA favors the development of the mine and many villagers close to the proposed mine development. Much of the mineralized area was selected by the natives as part of the ANCSA process, so if developed, the Kobuk villagers stand to garner not only royalties but local employment.

The village of Shungnak is one of the supporters of the proposed road. Photo George Wuerthner

Among the supporters of the road are Northwest Arctic Borough, the  Native Village of Shungnak, Alaska’s Congressional Delegation, the Alaska Chamber, the Alaska Miners Association, the Alaska Support Industry Alliance, the Council of Alaska Producers, and Resource Development Council for Alaska, Inc.

Most of the mining claims are owned by NANA corporation. In 2011, NANA and Trilogy Metals formed the Upper Kobuk Mineral Projects (UKMP). This partnership brings together Bornite and several other copper-rich prospects on NANA-owned lands with the world-class Arctic deposit and dozens of similar volcanogenic sulfide prospects on state, federal, and patented mining claims in the Ambler Mining District.

NANA wants to develop the Ambler mines as it has done for the Red Dog Mine (a zinc mine) north of Kotzebue. Red Dog is considered the most toxic mining operation in America. Profits from the Red Dog mine are a significant source of funds for NANA.

It’s important to note that if the first mines are developed, many other mineral deposits in the area will eventually follow. So this debate is about more than just this one mine and road. It will determine the future development of the entire western Brooks Range.


A sign in Kotzebue expresses opposition to the Ambler road. Photo George Wuerthner 

There is opposition to the road. Some of the local villagers were ambivalent about the road. Some told me it might impact subsistence practices, but the income from jobs and royalty makes modern subsistence with snowmachines, motorboats, and ATVS possible.

ATVs, snowmachines, motorboats and regular air service have changed village life. Photo George Wuerthner 

 On the other hand, the Tanana Chiefs Council represents the Athabascan people living along the route’s eastern portion. The villagers along this portion of the route will receive no financial benefit, but will get the impact of more people coming to hunt and fish on the lands they use for subsistence.

The Brooks Range Council has produced a video on the proposal, which you can see here.

Map showing the route of the proposed Ambler mine road from the pipeline haul road along the southern edge of the Brooks Range. The purple is Gates of the Arctic NP, the blue is Alaska state lands, the yellow is BLM and the varoius brown and gray represents native land ownership.

The development of the Ambler Mining District was the reason the Alaska National Interest Lands Conservation Act (ANILCA), passed in 1980, created many national parks like the Gates of the Arctic National Park. ANILCA had a clause authorizing the road. “Congress finds that there is a need for access for surface transportation purposes across the Western (Kobuk River) unit of the Gates of the Arctic National Preserve (from the Ambler Mining District to the Alaska Pipeline Haul Road), and the Secretary shall permit such access in accordance with the provisions of this subsection.”

The Trump administration in 2020 approved the road’s construction. Fortunately, the Biden Administration has remanded the decision to permit the Ambler Road back to the Bureau of Land Management for additional environmental review, giving the public another chance to halt this destructive project.

However, some observers believe this is just a delaying tactic and, ultimately, the road will be approved, especially given the Biden administration’s goal of creating more U.S. sources of critical minerals.


The road, if built, the construction will have numerous impacts. A tremendous amount of gravel will need to be mined to provide insulation of the permafrost, which underlies much of the proposed route.

It will cross 3000 streams, and three caribou migration routes.

Roads can be semi-permeable barriers, and although crossing such obstacles is possible, caribou may shift or entirely abandon their seasonal habitat when confronted with a road. The disturbance and activity along the road and mining operations will likely affect caribou in other ways. Studies have shown that caribou may travel up to 9.3 miles to avoid roads and 11.2 miles to avoid settlements.

For instance, a study of the Native-owned Red Dog Mine Industrial Access Road north of Kotzebue found that just four vehicles an hour affected the migration of 30 percent of collared caribou, or approximately 72,000 individuals of the 2017 population estimates.

Currently, residents can kill five caribou a day. However, the Western Arctic Caribou Herd has been in steep decline, and there is a discussion about reducing the kill. Road access may eventually result in more hunting pressure, and perhaps future reductions in caribou numbers.

Even if the Ambler Road is not built, the mine development may not go away. There are several other potential routes proposed including one that would traverse the Kobuk Valley, where I floated, and eventually reach Nome, where ore could be shipped south for processing.


While floating the river, I stopped at all the villages along the route to gauge the changes that had occurred during the intervening fifty years since I first set foot on the banks of the Kobuk.

Most residents were friendly and helpful.

Hunting caribou for food is still an important activity for villagers along the Kobuk River. Photo George Wuerthner 

Like nearly all Alaskan native villages, the modern world is evident everywhere. The shift from subsistence food gathering to a cash economy was visible everywhere. Patagonia clothing and blue jeans have replaced fur.

The need for cash is one reason why many villagers support the development of the Ambler mines. Many villagers I spoke with periodically worked at the NANA-owned Red Dog mine to earn cash for modern conveniences. They anticipated finding employment at the Ambler mining operations if developed. Given the scarcity of employment opportunities in rural Alaska, one can sympathize with the desire to have access to high-paying mining jobs.

Heavy equipment in Ambler. Buying and maintaining such equipment in a small village is costly. The proposed mines are viewed as one potential source of income for native people. Photo George Wuerthner 

Everyone from elementary school children to old elders now possess cell phones. The villages all have Wi-Fi access and transportation links. Even the tiny village of Kobuk, with just 200 residents, has two flights a day from Kotzebue, the transportation hub for the region. Most homes have indoor plumbing, electricity, and fuel oil heat, though wood stoves were also evident. Some buildings even have solar panels, though I am unsure how well they work in winter when there is virtually no sunlight.

A grocery store in Kotzebue, Alaska. Though expensive, food is readily available in all villages. However, many resident prefer eating wild game. Photo George Wuerthner 

New community buildings, modern schools, and small but insulated homes dominate the villages. Most of this construction was paid for with oil money. All villages had stores where you could buy basic food supplies, though the cost was probative. I recall seeing one bag of corn chips for $19.

All Terrain Vehicles (ATVs) and four four-wheelers were everywhere. I didn’t see many people walking as much as I observed people just riding around for fun, making a trip to the store, or visiting neighbors. In this way, the ATVs were used like cars are by most people outside of Alaska.

Some villagers also own motorboats to run up and down the river for hunting, fishing, or just going to their camps scattered along the Kobuk.

One change I noticed since I last lived near these villages is the absence of sled dogs. When I was on the Kobuk in the 1970s, dog sleds were still a practical transportation option for running trap lines and going from village to village. With the advent of snowmachines and more regular air transportation, feeding sled dogs became an expensive liability. As one villager told me, at least when you are not using your snowmachine, you don’t have to feed it.

While running a snowmachine or ATV requires fuel, various subsidies the villagers enjoy help to keep this cost reasonable. For instance, I was told that gasoline in Kiana costs $4 a gallon, less than the price in many western states.

Fish drying on a rack along the Kobuk River in the 1970s. Photo George Wuerthner 

Machines changed the use of the river corridor. When sled dogs were common, villagers had fish camps along the river to net salmon and other fish, fed to the dogs or for personal consumption. This is an anecdotal opinion, but it seemed to me that there were more fish camps along the river in the 1970s than I observed on my recent float. I saw many abandoned shacks and cabins that were once used as camps during the fishing season.

Some cabins were still maintained and used as a base for hunting or trapping. Some villagers liked having a cabin as a recreational getaway even though the villages were surrounded by miles of wildlands.


During the entire float, we saw no other recreationalists on the river. Every other day, we might see some natives driving a boat up or down the stream, but we did not see anyone else floating or camping along the river corridor.

Grizzly bear tracks on the beach where we camped in Kobuk Valley National Park. Photo George Wuerthner

Indeed, when we stopped on river bars to stretch our legs or camp for the night, we never saw any other human footprints, though we saw plenty of grizzlies, wolves, and moose tracks.

A cow moose and calf peers at our camp along the Kobuk River. Photo George Wuerthner 

Even with the occasional boat passing by and a few cabins along the river, the overall impression one has of the Kobuk Valley National Park is its remoteness and wildness. And if my impression about the decline in fish camps and other native use of the river is accurate, it may even be wilder today than in the 1970s.

In keeping with its reputation as the least visited national park, there was no “Welcome to your National Park” sign. There were no ranger stations. There were no rangers. There were no trails. No interpretative signs.

Even one of the significant geological features of the park, the Kobuk Valley dunes, was inaccessible. We searched for a trail that would take us to the dunes but could not locate one if it existed.


I recognize that if I were a villager living along the Kobuk River, I might support the proposed road. Although it is being called a private industrial road closed to public use, the same was said of the Dalton Highway. If opened to public use, the road would likely make it far less expensive for villagers to obtain everything from lumber to fuel oil to food.

In a region where job opportunities are notoriously seasonal and limited, employment at a mine would provide valuable income to villagers.

Nevertheless, the development of the Ambler Mining District will bring irreversible cultural and ecological changes to the Kobuk River valley.

I met a man in Ambler who had just returned from a hunting trip. He had moved to Ambler to pursue a subsistence lifestyle.

Not everyone, even villagers living along the river, would choose to return to a fully subsistence lifestyle. But where else can one even have such a choice?

For those who have grown up along the Kobuk, the decision to continue such a subsistence lifestyle is still available. While enjoying many of the modern amenities available everywhere, many native people choose to hunt and fish to supplement their cash economy. The full development of the Ambler Mining District, may preclude this choice.

We saw grizzly, wolf and moose tracks on just about every sandbar we stopped at. Photo George Wuerthner 

And where else can you go and see far more grizzly and wolf tracks than human footprints? Remote and wild places are increasingly scarce. The Brooks Range’s most outstanding value is its wildlands.

Sunrise on the Kobuk River and my tent, Kobuk Valley National Park.  Photo George Wuerthner 

The question for me and others who oppose the Ambler mine development is whether the benefits of industrialization of one of the wildest places in Alaska are worth the cost. While the Ambler mineral zone does possess globally significant ore resources, these minerals can be obtained elsewhere, where the ecological and social costs are lower.

Fall along the Kobuk River. Photo George Wuerthner

Are we wise enough to recognize that wilderness and wildness has intrinsic value, and that preservation of these attributes is worth more than copper and other minerals.

The answer to my question may be determined soon, depending on the outcome of the BLM and Biden administration decisions.





  1. Jerry Longobardi Avatar

    A real fine, balanced piece George. I just got off 15 days on the Noatak. Like the Kobuk, not too many humans tracks on the sand bars but a lot of grizzly, wolf, caribou , musk ox and fox.In the river were dolly varden, chum salmon lake trout and grayling.
    Flying in, I could see the Kobuk dunes to the south and
    it makes me sad to see the wildest country left in north America maybe lost forever to development. But, trying not to be too hypocrytical I took a commercial jet to Kotzebue, then an Otter to the Noatak and a 206 to the head of the river.A whole lot of fossil fuel . I suppose I could have been content to look at Nat. Geo photographer Sam Abell’s photos and read Ron Fisher’s accounts of the Noatak 46 years ago (Endless days on an Arctic River)and saved a lot of effort and resources.But, I had to see it myself. It took me 46 years to get there and I’m glad it’s still wild. .Hard questions and No easy answers….

  2. Ida Lupine Avatar
    Ida Lupine

    Very concerning. 🙁

  3. Selina Sweet Avatar
    Selina Sweet

    I just felt sad – really really sad. Like preparing for a funeral When we have a populace that’s passive toward disciplined focused action
    To keep oil in the ground, to inhibit the copper diggers ‘s reach and the required roads for the sake of non pecuniary luminescent experience of the truly wild is beyond the impossible. Video games have supplanted throwing your sleeping bag on the ground to watch the star showers or the constellations. Like Madonna, the material girl. We’re the material people. I appreciated the float, the observations, the well rounded reporting and the passion to keep this one roadless

  4. Brian L. Horejsi Avatar
    Brian L. Horejsi

    It is highly probable that this road will be built, and gone will be another irreplaceable wild land. With Haaland as Secretary, and enviros throwing environmental protection and wilderness overboard in order to harvest social justice donations, the land and wildlife that depend on it have few defenders.

    The demand for cash by local Indians is no surprise – why should it be – they are just like any other society, Although there is growing doubt that they collectively contain the ethical and moral restraints that have characterized the north american conservation movement. The betrayal of environmental protection in exchange for cash and control that dominates Indian leadership and tribe membership in the Ambler area should clearly expose the delusional and fraudulent reality of religious beliefs that Indians are born conservationists and “respect’ the land!

    1. Selina Sweet Avatar
      Selina Sweet

      Well, Brian. Clearly you’ve thrown down the moral gauntlet. I wonder. How many years have you and your family and neighbors lived on a subsistence income? or less? And in a time of unpredictable climate catastrophe? Isn’t it called shifting the blame to the victim? Were the mark of the larger society decidedly compassionate, the people would have alternative options to continue living in their indigenous way without starving and with material support for health care and their childrens’ education. A superb environmental activist named Jim Britell has recently written a piece on what Saul Alinsky, the great organizer of the 20th C, intended to do before he died. That is – organize the middle class. Without such, it’d become vulnerable to fascism, to guys like Agent Chaos. I sure hope you take a glance at it. Most illuminating.

    2. Barrie K Gilbert Avatar

      Dr. Brian Horejsi is right on in all aspects, both with experience in Western Canada and following native actions that are anything but conservation based.

  5. China Kantner Avatar
    China Kantner

    Hi George! I really appreciate your article and reflection on changes from the 70s. I grew up here in the region–only in my 20s but gosh the changes to culture and climate are really incredible and heart breaking. I am part of the grassroots group whose sign you happened along in Kotzebue this summer. Any news about the Road helps us raise awareness. Thank you 🙂

    I did want to make one comment. On any given day there are over 150 jobs available in the region. That doesn’t include any jobs at Red Dog Mine. Sure a lot of those are in Kotzebue, but plenty are in the Upper Kobuk. Need for employment is really not an argument we can make here.


George Wuerthner is an ecologist and writer who has published 38 books on various topics related to environmental and natural history. He has visited over 400 designated wilderness areas and over 200 national park units.

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George Wuerthner