Three students, UW’s Dr. Tim Billo, forest steward Paul Shannon, 500 hours of field work, 724 trees. We determined that hemlock mortality is concentrated in one six-acre site, with thriving hemlocks of all ages in the central, south and east portions of the forest This presents an opportunity for further study. Something is killing hemlocks, but it is not weather patterns, soil, geology or old age. The final report, with interactive map, data table, and statistics is here.