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<br />I'---==-~~ <br /> <br />- <br /> <br />.""11'- <br /> <br />-, <br /> <br />-.-- <br /> <br />- <br /> <br /> t" <br /> LAKE ~IEAD AT INTAKE TOWERS ,ABOVE HOOVER DAM Ci <br /> (.' <br /> " <br /> DATE t.7\ <br /> 19.19 <br /> 3/31. 10/2 9/.30 9/2A lOll 10/1 9/2.3 9/29 CHANGl: SI;\CE <br /> 1941 194.3 1944 1945 1946 1947 1948 1949 1941 1948 <br /> Water Surface Elf'\'3ti.m Feet.. 1l7D 1195 1187 Il78 Jl5R Il78 Jl82 Jl87 +17 +5 <br /> Annual Inflow ';1,., of N.)rmal . Jl7 80 94 84 6.1 95 96 103 <br /> Spt'c. Conduct. K " lOr... 1190 1050 1020 994 99.1 979 909 863 -327 -46 <br />'" Analyses in Paris per 'Million <br />'" <br /> Di~~ol\'ecl Solids . ....................u. 807 624 604 5RO 6,16 614 567 553 -254 -14 <br /> Tofal Hardne51s u.. . 398 340 .118 308 319 317 295 280 -Jl8 -15 <br /> Carbonate Hardness. ................ 141 121 ]23 117 ]25 122 ]21 120 -21 -I <br /> Noncarhonate Hardnes51 257 219 195 191 lQ:J 19,\ 174 160 -97 -14 <br /> Sulfate SO. ................. 37,1 292 266 252 277 267 241 234 -139 -7 <br /> Chloride C1 83 63 64 6:1 72 68 61 59 -24 -2 <br /> <br />.;'Ilaximum salinity of record, just prior to the first filling and <;pillway overAow, and resuhing frolll the low inflow of the Lwo preceding year&, <br />65 per cent and 57 per cenl of normal for ]939 and 19-10, respectively, <br /> <br />. <br />