▁flo oded ▁on ▁numerous ▁occasions , ▁most ▁significantly ▁in ▁the ▁Le ith ▁Flo od ▁of ▁ 1 9 2 9 ▁and ▁in ▁ 1 9 5 5 , ▁when ▁it ▁led ▁to ▁the ▁in und ation ▁of ▁many ▁properties ▁in ▁North ▁East ▁Valley . ▁Prote ction ▁works ▁have ▁been ▁built ▁over ▁the ▁years , ▁most ▁not ably ▁real ignment ▁and ▁wall ing ▁of ▁the ▁channel ▁in ▁the ▁lower ▁part ▁of ▁North ▁East ▁Valley ▁after ▁the ▁ 1 9 2 9 ▁flo od ▁and ▁further ▁work ▁on ▁the ▁same ▁area ▁in ▁ 1 9 6 5 . ▁Further ▁wall ing ▁of ▁the ▁channel ▁in ▁the ▁central ▁part ▁of ▁North ▁East ▁Valley ▁was ▁undert aken ▁during ▁the ▁ 1 9 7 0 s . ▁ ▁References ▁ ▁Category : Ge ography ▁of ▁Dun ed in <0x0A> </s> ▁Ra im ondo ▁Me i ▁( 1 7 4 3 - after ▁ 1 8 1 0 ) ▁was ▁an ▁Italian ▁composer ▁who ▁was ▁ma estro ▁di ▁c app ella ▁at ▁P avia . ▁He ▁composed ▁several ▁oper as ▁including ▁an ▁I perm estra ▁and ▁an ▁If igen ia ▁in ▁A ul ide ▁to ▁the ▁libre tt os ▁of ▁Met ast as io . ▁ ▁References ▁ ▁Category : 1 7 4 3 ▁birth s ▁Category : 1 8 1 0 s ▁death s <0x0A> </s> ▁The ▁large ▁but ter fly ▁family ▁Ly ca en idae ▁contains ▁the ▁following ▁gener a : ▁ ▁A ▁B ▁C ▁D ▁E ▁F ▁G ▁H ▁I ▁J ▁K ▁L ▁M ▁N ▁O