Since 2008 The Washington State Department of Transportation has funded research by faculty and students from the Department of Biological Sciences at Central Washington University in conducting ground-breaking research that is essential both to the expansion of Interstate-90 on Snoqualmie Pass and preservation of critical wildlife habitat and biodiversity.

See also:  High Country News "The Biggest Wildlife Crossing You've Never Heard Of"  by Christi Turner.  May 2, 2014