▁and ▁cover ▁techniques , ▁but ▁the ▁southern ▁pipeline ▁passes ▁under ▁the ▁River ▁Col ne ▁and ▁beneath ▁the ▁A 1 2 ▁road ▁and ▁the ▁East ▁Coast ▁railway ▁to ▁the ▁west ▁of ▁Col chester . ▁T win ▁sh aft s , ▁ ▁in ▁diameter ▁and ▁ ▁deep ▁were ▁exc av ated , ▁and ▁ ▁of ▁ ▁diameter ▁b ored ▁tunnel ▁passed ▁under ▁both ▁the ▁road ▁and ▁the ▁railway . ▁The ▁pipeline ▁was ▁then ▁laid ▁through ▁the ▁tunnel ▁and ▁gr out ed ▁in . ▁The ▁entire ▁project ▁was ▁completed ▁in ▁ 2 0 1 4 . ▁ ▁Supp ly ▁area ▁The ▁company ▁supplies ▁water ▁to ▁an ▁area ▁of ▁ ▁in ▁sout heast ▁Nor folk , ▁east ▁Su ff olk , ▁Es sex ▁and ▁the ▁London ▁bor ough s ▁of ▁B ark ing ▁and ▁D agen ham , ▁Ha ver ing ▁and ▁Red bridge ▁in ▁Gre ater ▁London . ▁The ▁total ▁population ▁served ▁is ▁ 1 . 8 ▁million , ▁through ▁over ▁ 7 3 5 , 0 0 0 ▁domestic ▁connections ▁and ▁over ▁ 4 7 , 0 0 0 ▁non - house hold ▁connections . ▁Es sex ▁and ▁Su ff olk ▁is ▁a ▁' water ▁only ' ▁supp lier , ▁with ▁se wer age ▁services ▁supplied ▁by ▁Ang li an ▁Water ▁( Es sex , ▁Nor folk , ▁Su ff olk ▁and ▁part ▁of ▁Up min ster ) ▁and ▁Th ames ▁Water ▁( Gre ater ▁London ▁and ▁part ▁of ▁Br ent wood ). ▁ ▁Bibli ography ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : W