STEVENS PASS BNSF Railway's scenic Sub

2010 operations witnessing long stack trains and heavy grain trains thundering up 2.2%  grades with mid and rear end helpers plus Amtrak's Empire Builder on its daily run between Chicago and Seattle. The Highlight of the line is the famous 7.8 mile Cascade tunnel, the longest tunnel in the united States. See how smoke and fumes are flushed out of the tunnels in between trains. Plus recount the 1910 Wellington avalanche which swept two trains of the mountain.