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<br />3.3 1989 Field Sampling Pro~am <br /> <br />3.3.1 Stream Gaging Locations. Stream gaging and sediment measurements were made three <br />times by RCI at five locations on the Little Snake River and two locations on the Yampa River. The five <br />Little Snake sites range from the Yampa River confluence upstream to Dixon, Wyoming, and were chosen <br />to allow better quantification of stream flow and sediment loadings in the lower basin. Two of the Little <br />Snake sites are telemetry stations (Little Snake River near Lily, CO - [09260000] and Little Snake River <br />near Dixon, WY - [09257000]), which can be accessed through the Colorado State Engineer computer <br />stream flow system. The two Yampa River sites were chosen to supplement the telemetry record at the <br />Yampa River near Maybell, CO - [09251000] from convenient bridges. The locations of the seven sites are <br />shown in Fig. 3.1. Limited sampling was also done in the Yampa Canyon during the float trip. <br /> <br />I <br /> <br />N <br /> <br /> <br />. 10'. WYOUING <br />41 r"co':ciiWic)--- <br />: <br /> <br />o 10 20 <br />I . " <br />o 10 20 aD KLOMETERS <br /> <br />Figure 3.1 Map of Yampa River Basin showing tributaries to the Yampa <br />and Little Snake Rivers (after Andrews, 1978), and showing <br />1989 gaging station locations. <br /> <br />3.3.2 Sampling Techniques. Standard u.S. Geological Survey (USGS) procedures were utilized <br />for stream gaging, sediment measurements, and laboratory analysis of sediment samples. Cable-winched <br />equipment, suitable for high to moderate flows, was used from bridges on the Yampa and Little Snake <br />Rivers (see Fig. 3.2). Later in the season, at some bridges, hand held equipment was used as runoff <br />decreased and flow depths became wadeable on the Little Snake River. Hand held equipment was not <br />used for the Yampa River. <br /> <br />3-2 <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br />