sk aya ▁line ▁would ▁become ▁part ▁of ▁it . ▁ ▁The ▁line ▁formally ▁opened ▁in ▁August ▁ 1 9 6 9 ▁and ▁for ▁more ▁than ▁a ▁de cade ▁the ▁operation ▁was ▁continuous . ▁However , ▁by ▁the ▁early ▁ 1 9 8 0 s ▁the ▁future ▁districts ▁of ▁O re kh ovo ▁and ▁Z y ab lik ovo ▁were ▁act ively ▁growing ▁and ▁were ▁in ▁des perate ▁need ▁of ▁a ▁Metro , ▁thus ▁construction ▁began ▁on ▁the ▁second ▁branch . ▁However ▁the ▁original ▁idea ▁was ▁that ▁upon ▁the ▁completion ▁of ▁the ▁second , ▁longer ▁branch , ▁the ▁K akh ov sk aya ▁would ▁close ▁and ▁remain ▁closed ▁until ▁the ▁large ▁ring ▁would ▁be ▁complete . ▁On ▁December ▁ 3 0 , ▁ 1 9 8 4 ▁the ▁O re kh ovo ▁branch ▁was ▁opened , ▁and ▁the ▁K akh ov sk aya ▁was ▁closed . ▁ ▁And ▁on ▁December ▁ 3 1 , ▁ 1 9 8 4 ▁the ▁O re kh ovo ▁branch ▁was ▁closed ▁and ▁K akh ov sk aya ▁was ▁re open ed . ▁A ▁flo od ▁in ▁the ▁new ▁tunnel ▁forced ▁the ▁closure ▁of ▁the ▁new ▁stations , ▁and ▁the ▁extensive ▁ins istence ▁of ▁Z i L ▁convinced ▁the ▁city ▁authorities ▁not ▁to ▁close ▁the ▁shorter ▁branch . ▁This ▁however ▁created ▁a ▁number ▁of ▁problems . ▁One ▁of ▁which ▁was ▁the ▁track ▁arrangement ▁at ▁K ash ir sk aya ▁where ▁the ▁south bound ▁trains ▁directions ' ▁separate ▁only ▁after ▁the ▁station , ▁not ▁before , ▁thus ▁prevent ing ▁proper