As a precursor to a proposed hatchery facility, bio-baseline and manageability studies were initiated in the spring of 1979 and continued in the spring of 1980. The purpose of the downstream portion of the 1980 study was four-fold: 1) to capture, rear and CWT 75,000 chinook fry; 2) to obtain downstream timing of all juvenile salmonids; 3) to determine population estimates of chinook fry, and 4) to obtain biological samples of juvenile salmonids throughout their downstream migration.