In most parts of the world, the ground beneath a construction site can be treated as a fixed and stable reference point. You dig, you install, you backfill, and the infrastructure stays where you put it. In permafrost regions which span vast stretches of Alaska, Canada, Russia, and the broader Arctic, that assumption does not hold.
What Is Permafrost and Why Does It Matter?
Permafrost is ground that remains frozen for at least two consecutive years. More than 80% of Alaska, 50% of Canada, and 65% of Russia sit on it, with roads, pipelines, buildings, and buried utility networks all depending on it staying frozen and stable. When permafrost thaws, the ground subsides, and buried infrastructure shifts position because the ground itself has moved. It is one of the only environments in the world where a utility record can become inaccurate without anyone touching the infrastructure.
How Has Construction Traditionally Handled It?
Arctic engineers have spent decades developing techniques built around one core principle: keep the ground frozen. Most structures are built on elevated piles so that heat from the building cannot transfer into the permafrost, allowing cold air to circulate beneath. For buried utilities and pipelines where going above ground is not practical, thermosyphons are the go-to solution. These are passive cooling systems that use the natural circulation of fluid to continuously transfer heat away from the soil, maintaining frozen conditions around buried infrastructure. Thermosyphons have been a best practice in Arctic engineering for over 50 years. Gravel pads, insulated embankments, and ground temperature monitoring systems round out an established toolkit that has served the industry reasonably well, at least under historically stable conditions.
How Is Climate Change Making This Harder?
The Arctic is warming at roughly four times the global average rate, and the infrastructure designed to protect permafrost is struggling to keep pace. Systems sized for historical temperature conditions are increasingly being pushed beyond their intended parameters, and infrastructure engineered to last decades on stable frozen ground is now contending with a ground environment that is actively shifting beneath it.
What Are the Real-World Consequences?
The impacts are already tangible. In Point Lay, a coastal community in northern Alaska, rapidly accelerating permafrost thaw has caused water and sewer failures, road hazards, listing power poles, and unmoored fire hydrants. Financially, permafrost thaw damage in Alaska alone is projected to cost between $37 and $51 billion by mid-century. Nearly half of all Russian roads on permafrost, a quarter of Alaskan roads, and 17% of Canadian roads face significant damage risk from thaw subsidence.
For construction and utilities professionals, this creates a compounding data problem. Repair crews working in difficult conditions under time pressure leave documentation gaps, the same issue that affects utility management everywhere, however in permafrost regions those gaps are amplified by a ground environment that keeps changing after the work is done.
How Are Technologies Like LiDAR Helping?
The most significant shift in how the industry is responding is the move from periodic static surveys to continuous dynamic monitoring. Rather than capturing subsurface data once and filing it away, the goal is to keep records current as ground conditions evolve.
Mobile LiDAR systems deployed in the Canadian High Arctic have demonstrated that rapid, high-density data acquisition can effectively monitor permafrost landscape changes over time, with direct implications for how infrastructure is built and maintained as ground ice melts. Researchers have also applied LiDAR sensors for time-lapse scanning of Arctic roads and runways affected by thawing permafrost, providing a cost-effective method of tracking structural movement over extended periods.
When this data feeds into GIS platforms, engineers gain something static maps never offered: a continuously updatable spatial picture of how the subsurface environment is changing. Ground temperature readings, subsidence mapping, and utility records can all be layered into a single dynamic model, helping identify at-risk infrastructure before it fails rather than after. AR tools extend this further into the field, giving crews on-site visibility into how records compare to physical reality and flagging discrepancies in real time.
In permafrost regions, the margin for relying on outdated underground data is smaller than almost anywhere else in the world. Although the tools to close that gap are here, the challenge is deploying them consistently enough to keep pace with a ground that will not stay still.
