Build ings ▁and ▁structures ▁in ▁Su ff olk ▁County , ▁New ▁York ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Su ff olk ▁County , ▁New ▁York <0x0A> </s> ▁Mach ek ha ▁() ▁is ▁a ▁rural ▁local ity ▁( a ▁sel o ) ▁and ▁the ▁administrative ▁center ▁of ▁Mach esh ans ko ye ▁R ural ▁S ett lement , ▁K ik vid z ens ky ▁District , ▁Vol g og rad ▁O blast , ▁Russia . ▁The ▁population ▁was ▁ 2 , 4 7 5 ▁as ▁of ▁ 2 0 1 0 . ▁There ▁are ▁ 1 6 ▁streets . ▁ ▁References ▁▁ ▁Category : R ural ▁local ities ▁in ▁Vol g og rad ▁O blast <0x0A> </s> ▁Y aw ata ▁Ste el ▁Works ▁dam ▁collapse ▁occurred ▁on ▁May ▁ 1 , ▁ 1 9 1 6 ▁in ▁Y ah ata , ▁Fu ku oka ▁when ▁the ▁Great ▁Dam ▁col lapsed ▁killing ▁hundreds ▁and ▁cr ushing ▁thousands ▁of ▁homes . ▁ ▁Background ▁ ▁By ▁ 1 9 1 2 , ▁ 8 0 % ▁of ▁Japan ' s ▁p ig ▁iron ▁production ▁was ▁from ▁Y aw ata ▁Ste el ▁Works . ▁An ▁integrated ▁mill ▁with ▁co ke , ▁iron , ▁and ▁steel ▁facilities , ▁Y ah ata ▁was ▁also ▁responsible ▁at ▁this ▁time ▁for ▁ 8 0 - 9 0 % ▁of ▁Japan ' s ▁steel ▁output . ▁Energy ▁efficiency ▁was ▁greatly ▁improved ▁by ▁the ▁conversion ▁from ▁steam ▁to ▁electric ity ▁as ▁a ▁power ▁source , ▁resulting ▁in ▁a ▁drop ▁in ▁consumption ▁of