Drilling for oil in Alaska, particularly in the Arctic National Wildlife Refuge (ANWR), poses serious risks to fragile ecosystems, Indigenous communities, and the global climate. The most contested area is the Coastal Plain, a 1.56-million-acre stretch along Alaska’s northern coast that serves as critical habitat for caribou, polar bears, and over 200 migratory bird species, while also holding deep cultural and spiritual significance for the Gwich’in Nation.
Caribou Calving Grounds at Risk
The Coastal Plain of ANWR is the primary calving and nursery ground for the Porcupine caribou herd, one of the largest migratory caribou herds in North America. The herd’s range spans Alaska, the Yukon, and the Northwest Territories, but the animals return to this specific stretch of Arctic coast each spring to give birth and raise their young. Canada recognized the importance of this calving area decades ago by establishing Ivvavik National Park to protect the herd’s calving grounds on the Canadian side of the border.
Caribou are extremely sensitive to disturbance during calving season. Industrial noise, roads, and pipelines can alter migration routes and push mothers away from the nutrient-rich coastal vegetation they depend on during the most energy-intensive weeks of the year. Even moderate displacement from preferred calving habitat has been linked to lower calf survival rates. Oil infrastructure doesn’t just occupy the land directly beneath it. Roads, pipelines, and gravel pads fragment the landscape in ways that reshape how caribou move across it for generations.
Polar Bear Denning and Seismic Disturbance
The Coastal Plain is also one of the most important maternal denning areas for polar bears in Alaska. Female polar bears dig snow dens in the fall where they give birth and nurse cubs through the winter before emerging in spring. Oil exploration typically involves seismic surveys, which use heavy vibroseis trucks or explosive charges to map underground geology. These surveys happen in winter, directly overlapping with denning season.
Research published in The Journal of Wildlife Management evaluated how seismic activity affects denning polar bears on the Coastal Plain. Bears that hadn’t yet emerged from dens and were within 1.6 kilometers of seismic survey lines were considered disturbed, and disturbance can cause mothers to abandon dens prematurely, reducing cub survival. The study found that unrestricted seismic operations could disturb a large proportion of dens, though carefully designed surveys with spatial and temporal restrictions reduced den disturbance by over 90%. Adding aerial den detection surveys before seismic activity cut disturbance by another 68%. But these are best-case modeling scenarios. In practice, detecting snow-covered dens from the air is unreliable, and industry compliance with restrictions varies.
A Massive Migratory Bird Hub
The Arctic Refuge hosts over 200 bird species from all 50 U.S. states and countries around the world, according to the U.S. Fish and Wildlife Service. These birds travel thousands of miles to nest, rear young, and feed on the Coastal Plain during the brief Arctic summer. Species include shorebirds, waterfowl, raptors, and songbirds that winter as far away as South America, Africa, and Asia. Industrial development on the plain would introduce noise, light, pollution, and habitat fragmentation into one of the last undisturbed nesting areas in North America, with ripple effects felt along flyways spanning entire hemispheres.
Sacred Land for the Gwich’in Nation
The Gwich’in people, whose communities span northeastern Alaska and northwestern Canada, have depended on the Porcupine caribou herd for thousands of years. The caribou are central to Gwich’in nutrition, culture, and spiritual life. In the Gwich’in language, the Coastal Plain is called Iizhik Gwats’an Gwandaii Goodlit, meaning “the sacred place where life begins.”
The Gwich’in Steering Committee has consistently opposed drilling on the Coastal Plain, stating that oil and gas development would destroy the caribou calving grounds and, in turn, devastate the Gwich’in people. As Galen Gilbert, First Chief of Arctic Village Council, put it: drilling on this land “directly contradicts years of Gwich’in engagement and advocacy” and would cause “irrevocable harm to the Gwich’in and our way of life.” Opening the Coastal Plain to oil leases effectively prioritizes energy extraction over the food security and cultural survival of an Indigenous nation that never consented to the trade-off.
Permafrost Damage That Can’t Be Undone
Alaska’s North Slope is built on permafrost, ground that has remained frozen for thousands of years. Oil drilling infrastructure destabilizes this frozen ground in ways that persist long after operations end. A 2024 study published in Scientific Reports examined both active oil well pads and legacy sites on Alaska’s North Slope and found that oil well pads accelerate permafrost degradation, and the damage persists despite remediation efforts.
The mechanics are straightforward. Gravel pads absorb and radiate heat, warming the ground beneath and around them. This causes the frozen layer to thaw deeper than it naturally would, mobilizing water that spreads laterally and creates expanding zones of subsidence and pooling. One legacy well pad examined in the study, abandoned and remediated 40 years ago, still showed visible permafrost subsidence, water pooling, and areas of abrupt thaw expanding beyond the original pad footprint. The researchers described subsequent remediation as “nearly impossible.”
This matters beyond the local landscape. Permafrost stores enormous quantities of organic carbon. When it thaws, microbes break down that carbon and release greenhouse gases, primarily carbon dioxide and methane. Oil infrastructure essentially creates hot spots that kick-start this process, and the thaw keeps spreading on its own. According to industry estimates, subsurface disturbance from active oil and gas withdrawal can cover up to 130 square kilometers per pad. Across multiple pads, that adds up to a significant acceleration of a feedback loop that worsens climate change.
Oil Spill Cleanup in Arctic Conditions
Cleaning up oil spills is difficult anywhere, but Arctic conditions make it extraordinarily so. Freezing temperatures, sea ice, extended darkness for months of the year, and extreme remoteness all limit the effectiveness of standard spill response techniques. Boom systems that contain floating oil don’t work well in ice-choked waters. Chemical dispersants become less effective in cold temperatures. And the remote location of Alaska’s North Slope means response crews and equipment can take days to arrive.
The Exxon Valdez spill in 1989, which occurred in Alaska’s Prince William Sound under far more accessible conditions, demonstrated how poorly oil spill recovery works even in a best-case scenario. Only about 14% of the oil was recovered. In the harsher, more remote conditions of the Arctic Coastal Plain and adjacent waters, recovery rates would likely be even lower. Oil trapped under or within sea ice can persist for months, spreading over vast areas when the ice eventually breaks up.
Limited Oil for a High Cost
The amount of economically recoverable oil beneath the Coastal Plain is uncertain and relatively modest in the context of U.S. consumption. Even optimistic estimates suggest the refuge’s oil would supply only a small fraction of national demand, and it would take roughly a decade of development before any oil began flowing. In a global energy market, the effect on gasoline prices would be negligible. The calculation, then, is whether a marginal and temporary boost to domestic oil supply justifies permanent damage to one of the last intact Arctic ecosystems, the displacement of wildlife populations that depend on it, and the undermining of Indigenous rights and food security that have been exercised for millennia.