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Sylvan Pass: Sometimes an Entrance to Yellowstone National Park


By David Nolt, 1-03-08

Photo courtesy of Yellowstone National Park.

Avalanche-prone Sylvan Pass, which connects Cody, Wyoming to the interior of Yellowstone National Park, is currently open for oversnow travel. Wait, no, it’s closed. Nope, open. Closed. Wait, it’s definitely open. For now.

Between December 29, 2007 and New Year’s Day, Park Service officials have closed the pass twice due to avalanche conditions. Using howitzers and helicopters for avalanche mitigation, the Park Service reopened the pass on the same days of closures, but the troubled recreation travel corridor continues to claim the time of Park Service staff and precious, limited federal dollars.

“It is a challenging place for us to work,” Yellowstone National Park Spokesman Al Nash admits. “It’s a challenging job that we’ve been doing for a long time.”

Since 1973, to be precise, and despite a draft Environmental Impact Statement (EIS) in 2006 with a preferred alternative of closing the pass in the winter, Park Service employees continue to open the dangerous pass to the tune of roughly $200,000 each winter.

Discussion of closing Sylvan Pass first began to gain steam in March 2006, according to Nash. In the 2006 EIS the Park Service documented concerns over the level of danger for employees clearing the pass and the high cost of avalanche mitigation measures. Employees must travel across 20 avalanche paths to get to Sylvan Pass for howitzer operations, and flying helicopters in the area is also very dangerous and expensive.

For Tim Stevens of the National Parks Conservation Association, the cost, environmental impacts and human safety issues related with avalanche mitigation do not warrant keeping the recreational route open, especially when considering the low number of visitors entering the park through the east entrance in the winter.

“To my knowledge, it is the only National Park Service unit that does avalanche control solely for recreational access,” Stevens says.

Snowmobilers and snowmobile businesses in the Cody area say closing the pass would be a major hit to their winter economy, and Wyoming legislators and Gov. Dave Freudenthal have argued adamantly to keep the pass open. The Park Service was set to move ahead with the EIS alternative of closing Sylvan Pass this winter, but at the last minute released a Record of Decision (ROD) on the winter-use plan to keep the pass open. The ROD also included changes in the controversial numbers of snowmobiles allowed in the park.

The Wyoming attorney general’s office filed a petition in a Cheyenne federal court on December 13th seeking a review of the Yellowstone National Park winter-use plan. Regardless of one’s opinions Sylvan Pass or caps on snowmobiles allowed in the park, no one is quite sure why the Park Service changed their tune in the final ROD.

“You can only assume there was tremendous political pressure on the park to change its decision, and who knows how high up that pressure came from,” Stevens surmises. “...at the 11th hour and the 59th minute, where did the change come from?”

Yellowstone National Park Spokesman Al Nash says he is not in a good place to speak about political pressure surrounding the changes, but that some groups involved with the process were aware of “political activity beyond the boundaries of Wyoming.”

“There has been very vocal input from the community of Cody on this issue for over a year before the EIS,” Nash explains. “Our goal has always been to look at this issue by including input from the broad range of groups involved...We don’t make our decisions in a vacuum.”



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