Laserfiche WebLink
<br />. ~,.., <br />I Q!' <br />, ~1,1 <br />IQ <br /> <br />. <br /> <br />. <br /> <br />flllct.cl,h7-eY/-f 3-/ <br /> <br />. <br /> <br />4520 Dolphin Lane <br />,\lexandria, Va. 22;;09 <br />Hay 2, 1978 <br /> <br />1-lr. J. l'!111iam !"cDonald <br />Colorado Dennrtc~nt of Natural Resources <br />1;13 8hfrman ~treet, Room 718 <br />Denver, Colorado e0203 <br /> <br />Dear Bill, <br /> <br />Transmitted herewith are copies of an ~nalysis of Upper Colorado <br />River Basin streams in ~~l~tion,to the Instream Plow Methodology devel- <br />Oped by the U .S.Pish Ill1d "'ildlite Service Cooperative Instream Flow <br />Service Group. It provides baCkground for the selection ot representative <br />stream reaches and, although such reaches have already been designat- <br />ed for the rrCRB Section 13 (a) Assessment, we suggest that copies be <br />made available to all Steering Co~ttee ~embers and to the state <br />fisheries personnel involved. <br /> <br />The following paragraphs briefly outline the procedures used <br />in the AnalysiS and the Summary accompanying it, together with under- <br />lying considerations applicable to each. <br /> <br />The Analysis was prepared as follows: <br /> <br />1. Arbitrarily establishing a series of size classes of <br />watershed areas in square miles. <br /> <br />a. 75- 249 e. 5,000- 9,999 <br />b. 250- 499 f. 10,000- 14,999 <br />c. 500- 999 g. 15,000- 24,999 <br />d. 1,000- 4,999 h. 25,000- 49,999 <br /> i. 50,000- 74,999 <br /> <br />2. Placing each u.s.a.s. gaging station in one of the <br />above size classes, according to the watershed area <br />upstream from the station. <br /> <br />Information for this was available in the Catalop; of <br />Information on 1;'ater Data, 1'.'ater Resources Re~ion 14, <br />(Upper Colorado), Edition 1974 published by t e u.S. <br />Depart~ent of the Interior, Geological survey, Cff1ce of <br />~ater Data Coordination. <br /> <br />.s <br />3. Ranking wp-terehed^in order of magnitude within each <br />size class. <br /> <br />4. Coding stations and watersheds into three Groups ac- <br />cording to their locations in relation to the Riverine <br />Analysis Areas (RAA's) within the Upper Colorado River <br />