▁water ▁treatment ▁plant ▁to ▁the ▁north ▁is ▁a ▁perfect ▁demonstr ation ▁of ▁the ▁vig orous ▁adv ancement ▁of ▁the ▁steel ▁industry ▁and ▁ 2 0 th - century ▁development . ▁ ▁The ▁four ▁communities ▁of ▁A ins worth ; ▁the ▁Bush , ▁Mill gate ▁Ch el ten ham / S outh ▁Chicago ▁and ▁Cal um et ▁quickly ▁developed ▁into ▁one ▁village ▁referred ▁to ▁collect ively ▁as ▁South ▁Chicago ▁during ▁the ▁wave ▁of ▁an nex ation ▁in ▁ 1 8 8 3 . ▁The ▁pre domin antly ▁wood fr amed ▁architecture ▁of ▁the ▁Bush , ▁Mill gate ▁and ▁eastern ▁Ch el tem ham ▁are ▁a ▁less on ▁in ▁Victor iana ▁with ▁the ▁' sun ken ▁yards ' ▁and ▁bridge - like ▁walk ▁ups ▁from ▁street ▁like ▁Houston , ▁Baltimore ▁and ▁Br andon ▁att est ing ▁to ▁the ▁degree ▁infrastr ucture ▁built ▁up ▁from ▁the ▁original ▁top ography ▁of ▁that ▁time . ▁It ▁also ▁demonstr ates ▁how ▁South ▁Chicago ▁was ▁not ▁immediately ▁affected ▁by ▁the ▁housing ▁ordin ances ▁restrict ing ▁the ▁use ▁of ▁l umber ▁for ▁home ▁building ▁after ▁The ▁Great ▁Fire ▁of ▁ 1 8 7 1 . ▁Most ▁of ▁the ▁neighborhood ▁north ▁of ▁East ▁ 8 3 rd ▁Street ▁and ▁west ▁of ▁South ▁Man iste e ▁Avenue ▁was ▁developed ▁after ▁W W II ▁and ▁contain ▁mostly ▁brick ▁homes , ▁but ▁under ▁the ▁ordin ance ▁brick ▁homes ▁began ▁being ▁built ▁throughout ▁the ▁newly ▁an nex ed ▁neighborhood ▁after ▁ 1 8 8 3 . ▁ ▁South ▁Chicago ▁was ▁b ust ling ▁with ▁waves ▁of