ign an ▁D az em ard ▁as ▁the ▁" Miss isk ou y ▁Bay ". ▁The ▁graph ▁will ▁change ▁several ▁times . ▁In ▁ 1 8 5 5 , ▁when ▁changes ▁to ▁elect oral ▁count ies ▁of ▁Lower ▁Canada ▁into ▁elect oral ▁districts , ▁the ▁Legisl ature ▁finally ▁adopt s ▁the ▁form ▁Miss is qu oi ▁to ▁design ate ▁the ▁county ▁and ▁the ▁region . ▁ ▁Ge ology ▁▁ ▁This ▁is ▁an ▁in - ground ▁by ▁gla ci ers ▁Bay ▁ago ▁ ▁years ▁and ▁then ▁cast ▁their ▁monitoring ▁de water ing ▁of ▁the ▁Champ lain ▁Sea ▁there ▁are ▁approximately ▁ ▁years . ▁The ▁maximum ▁depth ▁of ▁the ▁bay ▁is ▁about ▁ 4 . 7 5   m ▁and ▁its ▁bottom ▁is ▁made ▁of ▁regional ▁marine ▁depos its . ▁The ▁bay ▁waters ▁dra ining ▁south ▁into ▁the ▁Champ lain ▁Lake ▁and ▁the ▁Rich el ieu ▁River . ▁Until ▁the ▁late ▁ 2 0 0 0 s , ▁the ▁water ▁of ▁the ▁bay ▁was ▁st agn ant ▁and ▁the ▁bay ▁was ▁dying . ▁At ▁the ▁opening ▁of ▁the ▁new ▁bridge ▁on ▁the ▁US ▁side , ▁on ▁the ▁old ▁road ▁emb ank ment ▁was ▁partly ▁demol ished ▁which ▁brought ▁a ▁flow ▁of ▁fresh ▁water ▁from ▁the ▁Champ lain . ▁ ▁Environment ▁▁ ▁The ▁bay ▁has ▁a ▁great ▁divers ity ▁of ▁fa una ▁and ▁fl ora , ▁including ▁many ▁species ▁of ▁birds , ▁hence ▁the ▁establishment ▁of ▁a ▁national ▁refuge ▁on ▁the ▁US ▁side . ▁Its ▁be aches ▁are ▁very ▁popular ▁with ▁vac ation ers ▁in ▁summer