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, -2- .~ Wahweap-War~ Creek, Kane-Padre Creek area, and the Bullfrog Bay area are relatively flat and i.;ill offer SOr.:e s;~a':"lc'''' ',.;al.er '~'hen the re:;ervo.:r fL.l:;. Plant density is sparse and of insignificant nutrient v::.lue in the reservoir. During this study boating access ~o the reservoir ~as Possible at Wahweap, Hall's Crossing, and Hite. Dirt roads lead to the upper e:1ds of Wahweap and \.[arm Creek Bays; however, no developed l.:lunchinc; f.:lcilities i.'ere available. I:npoundment of \.-ater behind Gler::. Co.nyon D.:lm beGan in January, 19'~3. The initial filling of the reservoir has been described in a previo~s report (1963 segment). The'reservoir surface was at elevation 3414.6 feet at tte beginning of the study segment. At this elevation, the reservoir was storing 3,395}000 acre-feet of water and had a surface area of 31,200 acres. ~~an depth was 109 feet and depth of the reservoir at the dam was 269 feet. There was no significant change in water surface elevation u:1til the last i,:eek in March] .....hen because of water cor.:mi tments downstrear:J} the di versio!1 and outlet ,,;orks at the dam were opened and the reservoir dropped to elevation 3394.5 on ~hy 11 (Figlre 1). Spring runoff} cor.lbir:ed with curta.il:clent of releases fror.:I a i:i;;n of 39,200 acre-feet daily i:1 April to :1ear 2,OeO acre-feet daily near c,iLe end of Vl3.y, caused the reser'Joir surface to rise rapidly to elevatio~~ 3470.0 -;:.y the last week of June. Reser'/oir surface eleva~ion continued to rise steadily during July and AL:Qlst. In Septe::;ber the water level reached minimum pm:er pool at 31.90 feet. o.nl1 relca:;e::; then appro:d:n:.lted jnL'LG\-/ Cor the remainder of the year. At the er:d of ti1C stuuy sec:nent, L~lk'2 PU'':cll contained 6,690,000 acre-feet and had a surface area of 2ci,300 .:lcres. Mean depth was 251 feet and depth of the reservoir at tc.e do.m i,',J.3 :).5 fb2t. In February, 1964 the reservoir reached approximately 135 I;.iles frO:':1