Data are tabulated from a hydrologic study of the Beluga, Peters Creek, and Healy coal areas from July 1975 to June 1979. These include streamflow and water-quality data for all three areas, ground-water data for the Beluga and Healy coal areas, and information from springs in the Beluga coal area. Results of analyses of samples of the benthic invertebrate community in the Beluga area are also included.