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• 2.04.7 RESPONSE continued SURFACE WATER RESOURCES -QUALITY THE GENERAL AREA - The Colorado Water Quality Control Commission adopted "Water Quality Standards and Stream Clas~i- fication," which became effective on September 1, 1971. A~- cordingly, the Yampa and, tributaries from its source to its confluence with and including the Williams Fork of the river are classified Quality Class B-1. Class B waters are suitable for all purposes for which raw water is customarily used, ezcept pri- mary contact recreation, such as swimming and water skiing, (because of elevated fecal coliform levels) . Below the confluence with the Williams Fork the classification changes to B-2 which permits higher temperature and borer dissolved oxygen stan- dards. Yampa river water is alkaline in nature. The geology of the • headwater area yields predominately calcium bicarbonate type water. Sampling indicates that the water of the Yampa River is of good quality and in general meets Colorado water quality standards; (McCall-Elligson i Morrill, 1974) . Water quality of the East Fork of the Williams Fork River is ezcellent. The stream runs clear and cold during the majority of the year except for some turbidity increase during spring run- off. No biological or chemical pollutants are present in signifi- cant amounts in the East Fork, (USDI-BLM, 1976). Site apedfie water quality data was obtained for the Yampa and Williams Fork rivers within the general area and in very close prozimity to the points where runoff from the adjacent and permit areas enters them. This data was obtained by retreival from the EPA's computerized STOREY Water Quality Data Base. These data on the Yampa immediately up and downstream of Dry • Creeks confluence and the data on the Williams Fork immediately upstream of Dowden and Hayden gulch's confluences are pro- vided in Appendix S, Volume II both as raw data retrieval and