Overview
ALYESKA MAINLINE REFRIGERATION UNIT 2 is an operational oil pipeline facility in Glennallen, Alaska, United States. It is part of the Trans-Alaska Pipeline System, a critical infrastructure for transporting crude oil from the North Slope to Valdez.
ALYESKA MAINLINE REFRIGERATION UNIT 2 is an operational oil pipeline facility located at Richardson Highway MP 151 in Glennallen, Alaska, United States. This facility is a component of the Trans-Alaska Pipeline System (TAPS), one of the largest pipeline systems in the world, spanning approximately 800 miles from Prudhoe Bay to Valdez. The unit plays a key role in maintaining the flow of crude oil through the pipeline, particularly in regions where permafrost and extreme temperatures require specialized refrigeration to prevent ground thaw and ensure pipeline stability. The facility operates under the regulatory oversight of the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA) and complies with 49 CFR Part 195 for hazardous liquid pipelines. The Trans-Alaska Pipeline System has a design capacity of over 2 million barrels per day and has been in operation since 1977. Refrigeration units like this one are essential for managing the thermal effects of the pipeline on the surrounding permafrost, using heat pipes and refrigeration systems to maintain ground stability. Environmentally, the facility is situated in a remote area of Alaska, near the Copper River Basin and the Wrangell-St. Elias National Park and Preserve. The pipeline's operation requires careful monitoring to prevent oil spills and minimize impact on sensitive ecosystems, including wildlife habitats and waterways. The refrigeration unit contributes to the safe and efficient transport of crude oil, supporting the energy needs of the United States while adhering to strict environmental and safety standards.
Environmental context
The facility is located in a region underlain by permafrost, where pipeline operations must carefully manage ground temperature to prevent thawing and potential ground instability. The surrounding area includes boreal forests, rivers, and wildlife habitats for species such as moose, bears, and salmon. The Trans-Alaska Pipeline System has implemented extensive environmental monitoring and spill prevention measures, including leak detection systems and regular inspections, to protect the fragile Arctic and subarctic ecosystems.
Frequently asked questions
ALYESKA MAINLINE REFRIGERATION UNIT 2 is located at Richardson Highway MP 151 in Glennallen, Alaska, United States, within the Valdez-Cordova Census Area.
Refrigeration units on oil pipelines, especially in permafrost regions, are used to prevent ground thaw by removing heat from the pipe and surrounding soil. This maintains ground stability and prevents pipeline settlement or damage.
The Trans-Alaska Pipeline System (TAPS) is a major crude oil pipeline that transports oil from the North Slope of Alaska to the port of Valdez. It is approximately 800 miles long and has been in operation since 1977.
The Pipeline and Hazardous Materials Safety Administration (PHMSA) under the U.S. Department of Transportation regulates oil pipelines, including safety standards under 49 CFR Part 195.
Environmental risks include potential oil spills that could harm sensitive ecosystems, permafrost degradation, and impacts on wildlife. Operators implement measures such as leak detection, regular inspections, and spill response plans to mitigate these risks.
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