Chip Sealing

An employee on a large machine that spreads chips on the road
A dump truck and load hooked up to the chip spreader on a road in Mammoth Hot Springs.

Did you know Yellowstone resurfaces about 30 miles of roads each summer in addition to major construction projects? Over 14 million pounds (7,000 tons) of "chips" were sealed to road surfaces using 128,000 gallons of chip seal oil last summer. By extending the time between asphalt overlays, chip seals result in lower costs to maintain park roads over the long term.

"Chip seals enhance safety by providing good skid resistance, which is great for a place with so much wildlife on the roads. They also prevent deterioration of the asphalt surface from the effects of aging and oxidation due to water and sun." - Roads Supervisor Marty Powell

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Last updated: May 5, 2021

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