3fet2>.^>.oaoa 59 MOTES ON BEAVER LAZE WATER SUPPLY. Aore Feet Prior Rights 1748.2,5 Less Countess Bubna and McCarthy 707*00 1041.2.5 Acre Feet Plus .5/8 tf ?cf*oc 442.00 » * Net quantity due prior licensees 1483.25 Acre Feet Plus 20% for loss in transit 296.65 " * 1779.9O Acre Feet Time to be delivered - 80 days Quantity.per day - 1780 = 22.2.5 Acre Feet. « 11.22 o.f.s. go If no works had been constructed at outlet of lake the flow out of the lake would be reduced by the daily evaporation off the surface of the lake, which amounts to five acre feet per day, or 2.5 o.f.s. . fhis would make the quantity of water available for prior licensees 11.2 - 2..5 = 8.7 c.f^s. Their total quantity being reduced by 5 2 80 | 400 ac.ft. which would leave a net amount coming to them from the reservoir of I38O ac. ft. If the evaporation losses be divided proportionally between the prior licensees and the Company users then the prior licensees would have to carry 1/3 the evaporation loss or 0.9 o.f.s. Leaving a gross flow at Eldorado Ranch intake of 11.2 - 0.9 - 10.3 o.f.s. or assuming that the prior licensees were entitled to a gross flow past Eldorado Ranch intake of 12.0 c.f.s, their net flow would be 11.0 c.f.s. QUANTITY AVAILABLE FOR COMPANY USERS. Water stored in Reservoir 4600 aore feet Less claimed by prior licensees assuming that they stand 1/3 the evaporation losses 1647 H n Balance available to Company users 2953 Acre feet Less 2/3 of evaporation loss 267 n * 2686 1 » Less 20% loss in transit .537 n * 2149 w i Which represents the net balance available for 2000 acres or 1.07 ac.ft. per acre To which add already delivered at rate of ' 1.25 acre feet in the season/r^*».<^f? acre feet per acre. J> SL \n * — ^6 • ' ^ ^s ^e ne,t ©stiniated quantity available at "the ^ ,V ^^ntake of Company's pipe is 2686 acre feet 'C 0 ^ [I and ^e present operating capacity of P * a " the main pipe Is 18 c.f.s. or 2880 * » ^ {^ m I \ 0 s$ or only I94 acre feet in excess of the estimated available supply V ^ t which does not t&to into account any How into the lake. It is ^ £m Imperative that the Company operate their main pipe to fall tf « {$ capacity, viz? 20 c.f.s, which would increase the net capacity Jvc^ by 256 acre feet, or by 0.128 aore feet per acre, which would be (| to. equivalent to one irrigation for 2000 acres at rate of 2 acre feet in the Season. fhe pipe should be of sufficient capacity to take care of any excess over the above estimated available supply, which might be caused by rains above the reservoir, or present creek flow into the lake, of which no account has been taken. Also the above estimates assume that the prior licensees would get their full allowance of water to the 3lst August, which would be from six weeks to two months after the natural flow^of the stream had fallen to a negligable quantity. & <&ct & orx of1 / 2.0 ~3Z>crys. Memorandum re quantity of water that can be supplied through the Okanagan Centre Irrigation and Power Company's main pipe. Area to be Irrigated 2000 acres Acre feet. Present operating capacity of pipe 18 c.f.s which represents a flow in 120 days of from which deduct for loss through leakage £0% Net quantity available for irrigation Mean quantity per acre I.78 ac. ft. If pipe be operated to capacity of 20 c.f.s, the discharge in 120 days would be Less 20 % for loss Net quantity available for irrigation 3840Ae. Ft. Mean quantity per acre I.92 ac. ft. 4320 864 Ac 3456 .ft 4800 960 Ac it ► ft it *age (3) If system be operated till the 30th of September the discharge will be increased by ^S9fi a8* £*• Making a net increase of 960 Ac. ft. and a total net discharge of 4800 Ac. ft. or sufficient to supply 2.4 acre feet per acre for 200Q acres. If prior rights cease on the 31st July except as to 3 c.f.swhich is assumed to be the natural flew of the creek at such date,there will be made available an additional 11-3 « 3 c.f.s.=16 acre feet per day fer thirty days,or 330 ac.ft. gross at intake of Company pipe,which would bring the gross available supply at pipe intake t® 2686 * 380 * 3066 acre feet Less 20 % less = 613 ,f " Leaving 2463 « w net available for delivery en the lands Or for 2000acres 1.226 *J* " per acre Pluss already received 0.310 « Making a possibM 1.546 ac.ft.per acre total of Capacity of main pipe if operated to full capacity of 20 c.s.er 40 ac.ft.per day for 80 days « 32OO acre feet Estimated gross available supply at pipe intake 3066 * | Excess capacity of pipe over estimated gross supply 134 w ■ If pipe be operated under full head fer balance of season iti net capacity will be 2560 acre feet Or 1,28 • " per acre Pluss already received ,51 ? M • * Making a tetal possible quantity ©f 1.59 » I «" fer the season.