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<br />o <br />C.l <br />N <br />W <br />(0 <br />o <br /> <br />"- <br /> <br />transmitted to the Denver Offices BureAu of Reclamation in 1944, it was <br /> <br />reconnnended thAt a careful biologic!'l.l study be ID8de to determine the volume <br /> <br />of water releases necessary t.o preserve the fishery beJ.ovr Granby Dam ~md <br /> <br />'(jha:t the water for m[.iintenance of fishing be released in accord with the <br /> <br />findings of tha.t stud;y- 0 The Service a.nd the State also expressed opposition <br /> <br />t.o proposals which would mean sacrificing the yalue of one fishery, in this <br /> <br />case that of the Fraser River, by diverting flow to maintain values of <br /> <br />another stream, thAt is,? the Colorado River below Granby Damo <br /> <br />38. Detailed Studies 0 Subsequently t.."le Fish ::Ind Wildlife Service <br /> <br />did initiate H careful biological investigation of the problems involved, <br /> <br />beginning in 1947 and extending through 1949:) to determine the value of the <br /> <br />Colorado River fishery, the dependence of the fishery upon the pattern and <br /> <br />volume of stream flow and other environmental factors:) and the requirements <br /> <br />for the preservation of the fishery resource 0 These investigations and the <br /> <br />findings as to the recree,tioruU use and water requiremen ts of the fishery <br /> <br />below Granby Dam will be discussed in the paragraphs to follow under the <br /> <br />headings: (a) Fishernmn=use.!' <br />(b) Harvest data, <br />(0) Habitat studies, <br />(d) Hydrologic analysis,? and <br />.( e) Discu8si on and summary. <br /> <br />390 Fisherman-use. The fi~hing season in c.olorado opens May 25 and <br /> <br />closes October 310 During the open season in 1948 and 1949, intensive <br /> <br />studies were made to determine the totel nmnber of m~n-d~ys of fishing use <br /> <br />on the Colorado River from Granby Da.m through the Colorado Game and Fish <br /> <br />Department's property below Byers Canyon, thRt i8.9 to the mouth of Little <br /> <br />Muddy Creeko There are approx:im8tely 21.. 2 miles of stream included wi thin <br /> <br />this reach. In 1949, the fishing-use study was extended to cover the reach <br /> <br />from Little Muddy Creek to the bridge on state Highw~ 9 south of Krernmling, <br /> <br />Colorado 0 This Added approxima.tely 1703 river rni1es, ma.1dng a total of 38.5 <br />-12- <br />