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Table 4: Species detected by site in the Central Cascades.
I-90 Corridor
The stretch of I-90 of interest to CWMP lies between Hyak (milepost 54) and Easton (milepost
70). As a result of connectivity analysis, this section of I-90 was identified as a crucial corridor
for wildlife passing from the North Cascades to the South Cascades. Unfortunately, I-90
represents a major barrier to wildlife moving across the expansive Cascade Mountains.
Monitoring these sites gives invaluable information to the Washington Department of
Transportation and other decision makers as they upgrade and retrofit the interstate.
CWMP has prioritized the I-90 corridor for multiple years with both remote camera monitoring
and snow tracking. In the 2013 Spring-Fall season, six cameras were installed in the I-90
corridor to document all wildlife activity (Table 5). During the 2012 season only Level 3 species
were detected and this continued to be true for 2013 (Table 6). However, in contrast to the 2012
season, our cameras this season detected black bear at all but one site.
Table 5: I-90 site information for the 2013 season.
Price Creek and Price Noble sites saw the most wildlife activity including deer, elk, black bear,
coyote, and bobcat. However, each site received a variety of Level 3 species. This higher level of
activity is consistent with data from past years in both our winter and spring-fall seasons at this
site. It is notable that these sites are in habitat directly adjacent to where several wildlife
crossing structures will be constructed as part of Phase 2 of the I-90 Snoqualmie Pass East
Project, including the first wildlife overpass, which may break ground as soon as 2015.
Site Name Target Species Date Installed Date Uninstalled Lure/Bait
Price Creek All 14-May-2013 29-Sep-2013 Lure
Gold Creek North All 30-Jun-2013 20-Oct-2013 Lure
Gold Creek South All 22-Jun-2013 12-Oct-2013 Lure
Easton Island All 7-Jul-2013 27-Oct-2013 Lure
Mt Margaret All 13-Jul-2013 8-Oct-2013 Lure
Price Noble
All 14-May-2013 29-Sep-2013 Lure
I-90 Camera Sites
