▁U . S . ▁The ▁Canadian ▁Ent it lement ▁is ▁calculated ▁five ▁years ▁in ▁advance ▁for ▁each ▁operating ▁year ▁using ▁an ▁agreed ▁treat y ▁calculation ▁method , ▁and ▁the ▁amount ▁var ies ▁mainly ▁as ▁a ▁function ▁of ▁forec asted ▁power ▁loads , ▁thermal ▁generating ▁resources , ▁and ▁operating ▁procedures . ▁The ▁method ▁gives ▁Canada ▁a ▁" first - added " ▁storage ▁benefit ▁that ▁ign ores ▁U . S . ▁d ams ▁built ▁after ▁ 1 9 6 1 ▁( e . g . ▁Lib by ▁and ▁D wor sh ak ), ▁limits ▁sales ▁of ▁sur plus ▁power ▁to ▁California , ▁and ▁ex cludes ▁modern ▁fish ▁related ▁constraints ▁at ▁U . S . ▁d ams . ▁ ▁Without ▁the ▁first ▁two ▁of ▁these ▁limits , ▁the ▁Canadian ▁Ent it lement ▁would ▁be ▁slightly ▁less ▁than ▁half ▁of ▁current ▁values . ▁ ▁The ▁Canadian ▁Ent it lement ▁during ▁the ▁August ▁ 2 0 1 2 ▁through ▁July ▁ 2 0 1 3 ▁operating ▁year ▁is ▁ 5 0 4 . 5 ▁average ▁annual ▁meg aw att s ▁of ▁energy ▁( redu ced ▁by ▁ 3 . 4 % ▁for ▁transmission ▁losses , ▁net ▁ ≈ ▁ 4 , 2 6 9 ▁G Wh ), ▁sh aped ▁hour ly ▁at ▁peak ▁rates ▁up ▁to ▁ 1 3 2 1 ▁M W ▁( minus ▁ 1 . 9 % ▁for ▁transmission ▁losses , ▁net ▁= ▁ 1 2 9 6 ▁M W ). ▁The ▁Canadian ▁Ent it lement ▁is ▁market ed ▁by ▁Pow ere x ▁( elect