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trout, mountain whitefish, roundtail chub, redside shiner, speckled dace, fathead minnow, white sucker, flannelmouth sucker, bluehead sucker and mottled sculpin. Longnose suckers were again tentatively identified. Sculpins, caught only by electrofishing, appeared in greatest numbers. White suckers were second in abundance, and whitefish were the most abundant, game fish collected. At both locations, few sculpins were collected in the spring and bluehead suckers were collected only in the spring. Entrainment and impinge- ment were discussed in these reports, and efforts were made to collect fish eggs and larvae by conical metered net tows in May, 1976, Only redside shiner postlarvae were collected and only near Craig Station. Redside shiners were considered the fish most susceptible to entrainment and impingzment. Water resources and quality have been emphasized in several recent studies. Burkhard (1966) included the Yampa River in a 1964 survey of Colo- rado streams. Aflow-duration curve for the Yampa at Steambaat Springs (1956 through 1963) was presented. Stream flow was measured, habitat was classi- fied, and 15 bottom samples were collected at one station on the Yampa River, Invertebrates (identified to order or class) from deep and shallow fast- water zones were compared by number and volume. Water chemistry was also analyzed. Fishes were not collected. Yampa River data were also included in Weber's (1966) inconclusive comparison of Colorado stream-survey data. Dis- charge, sediment and temperature data on the Yampa River were reported in the U.S. Geological survey reports by Iorns, Hembree, Phoenix and Oakland (1964) and Iorns, Hembree and Oakland (1965). The Colorado Water Conservation Board (1969) reviewed the water resources of the Yampa River basin. Eddy (1975) concluded that point-source discharges in a study area from Steamboat Springs to Hayden, Colorado., had markedly affected diversity 22