The Okanogan River (WRIA 48) system is currently listed as a 303(d) stream due to water temperature exceedances. The Limiting Factors Analysis (SRFB) and the Okanogan Subbasin Summary (NWPPC) both list water temperatures as a factor limiting salmonid production. Determination of thermal input sources is a necessary precursor to corrective action. This project employed Forward Looking Infra-Red (FLIR) thermal imaging technology to collect water temperature information which along with densiometry riparian vegetation, stream flow, climate and stream channel width-to-depth ratio data was incorporated into a Stream Segment Temperature Model (SSTEMP) to assess thermal input sources and potential corrective measures. For budget cycle reason only the northermost 10 miles was processed during Phase I of the project: Phase II being subject to a separate budget authorization and was used to complete the analysis of data provide a llist of strategic water quality impromement projects and quantify the amount of available habitat (present and potential) for listed and non-listed Pacific Salmon species. Another objective was to collect detailed elevation data using LiDAR technology to provide high-resolution topographic data for the same length of river system together with approximately 50 meters of riparian zone on either side of the stream channels.