2 ▁to ▁ 1 9 2 6 ▁and , ▁at ▁the ▁time , ▁was ▁the ▁largest ▁dam ▁in ▁Europe . ▁▁ ▁The ▁dam ▁is ▁ 6 1 ▁metres ▁high ▁and ▁ 3 0 0 ▁metres ▁across , ▁with ▁the ▁thick ness ▁varying ▁from ▁ 5 4   met res ▁at ▁the ▁base ▁to ▁ 5   met res ▁at ▁the ▁top . ▁The ▁water ▁behind ▁the ▁dam ▁creates ▁the ▁ ▁Ch amb on ▁Lake ▁which , ▁at ▁ 3 1 2   he ct ares , ▁is ▁the ▁largest ▁body ▁of ▁water ▁in ▁the ▁region , ▁and ▁is ▁popular ▁with ▁waters ports ▁enthus iast s . ▁ ▁Electric ity ▁generation ▁is ▁via ▁six ▁val ves , ▁with ▁a ▁power ▁of ▁ 1 2   MW ▁each , ▁giving ▁an ▁annual ▁electric ity ▁production ▁of ▁ 1 0 1   mill ion ▁k Wh . ▁ ▁See ▁also ▁▁▁ ▁Ren ew able ▁energy ▁in ▁France ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : D ams ▁in ▁France ▁Category : Arch ▁d ams ▁Category : H ydro elect ric ▁power ▁stations ▁in ▁France ▁Category : D ams ▁completed ▁in ▁ 1 9 2 6 <0x0A> </s> ▁Richard ▁Port es ▁C BE ▁is ▁professor ▁of ▁Econom ics ▁at ▁London ▁Business ▁School . ▁ ▁He ▁was ▁President ▁of ▁the ▁Centre ▁for ▁Econom ic ▁Policy ▁Research , ▁which ▁he ▁founded . ▁He ▁also ▁serves ▁as ▁Direct eur ▁d ' E t udes ▁at ▁the ▁E cole ▁des ▁Haut es ▁Et udes ▁en ▁Sciences ▁Social es ▁in ▁Paris .