Sometimes It’s Best to Look Beneath You: A Successful Geothermal Project at Portland International Jetport




Commit to Success

America’s infrastructure needs a national commitment to bring existing infrastructure into a state-of-good-repair, and in the long term we must modernize and build in a targeted and strategic manner. This means leadership at the federal, state, and local levels of government, by businesses and individuals, to communicate the importance of our nation’s infrastructure, to craft innovative solutions that reflect the diverse needs of the nation, and to make the investments the system needs. By employing strategies to use every dollar more efficiently and by deploying creative solutions to infrastructure development such as public–private partnerships, we can implement the right projects on time at the right price.

Airport Finds Sustainable Success UndergroundSS-chartruse

The centerpiece of the Portland International Jetport’s $75 million terminal expansion project was the installation of a geothermal heating and cooling system that reduces operating costs and emissions. A creative first in the airport industry, the $3 million project was able to make use of a $2.5 million Federal Aviation Administration (FAA) Voluntary Airport Low Emissions (VALE) grant.

The system will maintain a constant temperature inside the terminal building by injecting heat into the ground during the summer and taking heat out of the ground during the winter. The system has 23 miles of high-density polyethylene piping and 120 ground wells that reach as deep as 500 feet. The system moves more than 475 gallons of water per minute with a 125 horsepower pump.

The new systems replace an oil-fired system and will save $160,000 in operating costs and prevent the emission of 1,000 tons of carbon per year, promoting both healthier infrastructure and alternative energy.

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