3 Year Spawner Enumeration Study. The goal of this study was to mark at least 5% of returning chinook salmon to provide a representative mark group for a mark-recapture population estimate. Examine as many carcasses of post-spawned fish to determine a precise estimate of the marked-unmarked ratio. From this we develop an estimate of the total return. Recover heads from coded wire tagged fish and determine contributions of each coded wire tagged group to the spawner escapement. Foster the development of technical and analytical stock assessment knowledge within NWSFA with the longer term goal of NWSFA staff attaining the Capability to independently undertake and document high quality, statistically defensible escapement assessments.