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<br />Selection of Representative Stream Reaches <br />. Page 2 <br /> <br />..... <br />~ <br />..... <br />m <br /> <br />. <br /> <br />. <br /> <br />characterized by higher elevation and' small tributary streams <br />(i.e., coldwater crout fisheries) need not be examined since <br />their flows are not apt to be significancly affected by future <br />.increases in water consumpcion. <br /> <br />B. In looking aC the major rivers (Price, San Juan, White, Creen, etc.) <br />it became increasingly apparenc thaC each is different enough from <br />the others that they probably cannot be classified into groups <br />of rivers and river reaches with reasonably similar characteristics. <br />Therefore, you will note thac each of the "groups" identified in <br />the attachment in fact consists of a single reach of river.. Of <br />course, each such reach should be reasonably homogeneous through- <br />out its length. <br /> <br />C. The number of "representative stream reaches" for the entire Upper <br />Basin needs to be held to 8 to 10 due to the budget constraincs <br />within which the Inscream Flow Croup must operate. <br /> <br />D. The tentaCively idencified "representat1ve stream reach" .for each <br />group has been selected at a U.S.C.S. gauging station in each <br />inst~nce in an effort to minimize' data collection problems and to <br />maximize the correspondence between such reaches and nodes (data <br />points) in the Bureau's CRSS model. <br /> <br />6. What I now need from each stace are comments on the following questions. <br /> <br />A. Does each "group", actually a single reach of river, make sense <br />in terms of its having reasonably homogeneous hydrologic, fishery <br />and recreaCional characteristics throughout its length? If not. <br />why? What other grouping (i.e., reach of river) would you suggest? <br /> <br />B. Is the "representative stream reach" for each "group" adequate? <br />If noc, what are the alternatives and do you have the stream <br />gauging profile, and cross-section data for such alternaCives? <br /> <br />7. In order to keep things moving, I need your response to these questions <br />as soon as possible, and in no events later than Thursday, Jan. 19th. <br />May I suggest an initial telephone response followed up in writing to <br />save time. <br /> <br />8. After the groups and "representative stream reaches" are selecced, <br />che following sceps will be taken. <br /> <br />A. The Inscream Flow Group will seek, in the first instance, to <br />obtain flow and cross section data for each "representative stream <br />reach" from U.S.G.S. records. If not available, the pertinent <br />staCe agencies will be consulted. In chis event, I have asked <br />the Instream Flow Group to make cheir initial conCact with each <br />state's Steering Commictee member so that that person can keep <br />track of his state's involvement. <br /> <br />B. The Instream Flow Group will forward the results of their efforts <br />to me, and I in turn to the states, so that the states can review <br />them. <br />