Glacier National Park (N.P.) and Flathead National Forest (N.F.), Avalanche Hazard Reduction by Burlington Northern Santa Fe Railway: Environmental Impact Statement2008 |
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adverse impacts air quality Amtrak analysis area aquatic avalanche activity avalanche cycles avalanche danger avalanche detection systems avalanche forecasting avalanche hazard reduction avalanche paths avalanche risk avalanche safety bald eagles Bear Wilderness beneficial blaster boxes bull trout Canada lynx closures corridor costs associated delays disturbance Doppler radar Environmental estimated existing snowsheds feet Flathead County Flathead National Forest Flathead River frequency ft yes geophone Glacier County Glacier National Park grizzly bears habitat Hamre and Overcast hazardous material health and safety helicopter high avalanche Highway increase installation John F Kenny Map locations long-term impact lynx Marias Pass Middle Fork minor moderate monitoring Montana Mountain natural sound negligible noise occur period potential project area railroad recreational Shed 9 site-specific impact slopes snow avalanches snow depth sensor snowpack snowshed construction soil species starting zones Stevens Canyon stream tracks traffic train USFS vegetation water quality wildlife winter