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15 <br />,~ .:;~, n,the bridge near Boulder (upper end of treated area) to its con- <br />- - ``° ace-v~ith the- Green River 26 miles downstream. Water-flow <br /> <br />~s _.~.~ <br />,c~,t'a' are recorded by the U. S. Geological Survey at two places in <br />}ts section. Fi ure s 4 and 5 <br />g graphically show the water-flow for <br />tote study period. The stream flow ranged from a low of 30 cubic <br />#eet per second (cfs) during the winter near the upper study limit <br />to nearly 5, 000 cfs near its mouth during ,the runoff. in June.._~The __ <br />methyl-orange alkalinity and hydrogen ion (pH) values recorded <br />during. the study at stations A and B are presented in Figures 6 and <br />?; standard methods were used to determine the water chemistry. <br />Xt station A, the alkalinity ranged from a low of 64 ppm CaC03 to <br />a~high of 158 ppm; the range at station B was from 64 ppm to 13T <br />PP~T• The higher values. were usually encountered during the- fall, <br />:~. .._ <br />when water flows were low. The pH values of the New Fork River. <br />varied from a low of 7.25 at station B to a high of 8.8 at station A. <br />The -New Fork in this section is characterized by long riffles <br />between the pools and only a few deep holes. The bottom is made <br />uP of medium-sized, rounded rubble and coarse gravel. There are <br />numerous back-waters and sloughs formed by old meanders of the <br />river..., Tributaries entering this section include Boulder Creek <br />and the East Fork River. <br />Section lI, of the upper Green River, covers about 16 miles <br /> <br />~~ <br />_~ <br />:; <br />-: <br />t~s <br />~. <br />2 <br />.~ <br /> <br />.} <br /> <br />from Sommers Bridge near Pinedale to the confluence of the New <br />