BILLINGS, Mont. — The old “Bombers” aren’t so old anymore.
The aged, yellow and red Bombardier snow coaches — the first machines to carry winter visitors into Yellowstone National Park — are now greener under the hood.
Two comprehensive studies measuring winter vehicle emissions in Yellowstone found Yellowstone Alpen Guides’ snowcoaches are the cleanest snowcoaches operating in the Park. The studies conducted in 2005 and 2006 by the University of Denver Department of Chemistry and Biochemistry, Gary Bishop et al, January 2007, measured a broad range of real-time emissons during actual snowcoach travel between West Yellowstone and Old Faithful. These classic historic Bombardiers are not only the oldest vehicles operating in Yellowstone but also the cleanest.
Modern snow coaches are cleaner and quieter than even the cleanest snowmobiles, according to two draft studies released within the Yellowstone National Park administration this summer.
The results also show that snowmobiles continue to violate noise standards in the park, even though their numbers are fewer and use best available technologies to reduce noise.
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