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KUOW's environment beat brings you stories on the ongoing cleanup of the Hanford Nuclear Reservation, alternative energy, the health of the Puget Sound, coal transportation and more. We're also partnered with several stations across the Northwest to bring you environmental news via EarthFix.

Avalanche Deaths Highlight Unstable Backcountry Conditions

Janet Kellam/Sawtooth Avalanche Center
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A deep slab avalanche, seen from above.

The avalanche center in Idaho's Sun Valley area is urging people to consider cancelling their plans in the backcountry.

Snowmobiler George Gilbert Martin Jr., 64, died on Sunday when he was buried by an avalanche in the Sawtooth Mountains. Lesley Dianne Martin survived for 90 minutes under the snow before being rescued and transported to the hospital.

The Blaine County Sheriff's Department says the avalanche debris was up to 8 feet deep. Two other snowmobilers in the group, from Sutherlin, Ore., were able to extricate themselves from the snow.

Simon Trautman, director of the Sawtooth Avalanche Center in Ketchum, says recent snow storms have created a thick slab of snow – and it's not stable.

"Below that storm slab there's very weak old snow that is capable – you can think of it like a house of cards," Trautman says. "So it'll hold something, but if you somehow move some way or another the whole house will collapse."

Last week, two backcountry skiers died in an avalanche in Oregon's Wallowa Mountains. Nine people have died in avalanches across the West since Feb. 8.

The Northwest Avalanche Center in Seattle says the Cascade Mountains from Mount Hood to the Canadian border are at high risk for avalanches.

Copyright 2014 NWNews. To see more, visit http://www.nwnewsnetwork.org/.

Jessica Robinson reported for four years from the Northwest News Network's bureau in Coeur d'Alene, Idaho as the network's Inland Northwest Correspondent. From the politics of wolves to mining regulation to small town gay rights movements, Jessica covered the economic, demographic and environmental trends that have shaped places east of the Cascades. Jessica left the Northwest News Network in 2015 for a move to Norway.