Just a kilometer or two upstream of where the Oksrukuyuk Creek crosses the Dalton Highway, approximately 15 miles south of the Sag River DOT station. A rock-scrubbing sampling technique was used to collect samples at several different stations, with two replicates at each station. The samples were collected about every 10 days. The same sampling procedure was used for all dates. The samples were preserved in ethanol then picked, sorted, counted, and measured in Duluth using a digitizing pad.
All insect measurements are from larval forms unless noted otherwise.