▁( 1 1 7 5 ▁M ld ) ▁when ▁all ▁three ▁p umps ▁were ▁running . ▁Once ▁the ▁station ▁was ▁complete , ▁the ▁old ▁sl u ice ▁was ▁blocked ▁off . ▁Further ▁improvements ▁to ▁the ▁d rain age ▁of ▁the ▁area ▁occurred ▁in ▁the ▁next ▁few ▁years , ▁with ▁a ▁p ump ing ▁station ▁being ▁built ▁at ▁W rangle ▁H ors es ho e , ▁at ▁the ▁ ▁eastern ▁edge ▁of ▁the ▁district , ▁in ▁ 1 9 5 9 , ▁and ▁the ▁first ▁electric ▁p ump ▁being ▁installed ▁at ▁La de ▁Bank ▁p ump ing ▁station ▁in ▁ 1 9 6 3 . ▁The ▁electric ▁motor ▁drove ▁a ▁ ▁p ump . ▁Two ▁new ▁p ump ing ▁stations ▁at ▁Le ver ton ▁and ▁Ben ington ▁were ▁completed ▁in ▁ 1 9 7 6 , ▁again ▁on ▁the ▁eastern ▁edge ▁and ▁p ump ing ▁directly ▁into ▁The ▁W ash . ▁The ▁p ump ing ▁station ▁at ▁Thor pe ▁C ul vert ▁was ▁managed ▁by ▁the ▁Ang li an ▁Water ▁Author ity , ▁but ▁a ▁replacement ▁in ▁ 1 9 8 3 ▁was ▁partly ▁fund ed ▁by ▁the ▁Four th ▁District . ▁The ▁Hob hole ▁p ump ing ▁station ▁was ▁modified ▁in ▁ 1 9 8 8 , ▁when ▁the ▁old ▁sl u ice ▁channel ▁was ▁re open ed ▁and ▁the ▁sl u ices ▁were ▁fitted ▁with ▁four ▁ ▁subm ers ible ▁electric ▁p umps , ▁manufact ured ▁by ▁Fly gt . ▁The ▁number ▁of ▁electric ▁p umps ▁at ▁La de ▁Bank ▁was ▁increased