▁a ▁p ump ing ▁station ▁that ▁p umps ▁water ▁up ▁the ▁lo cks ▁to ▁replace ▁that ▁used ▁each ▁time ▁the ▁lock ▁is ▁opened . ▁ ▁The ▁next ▁stage ▁of ▁Bath ▁Deep ▁Lock ▁is ▁number ed ▁ 8 / 9 ▁as ▁two ▁lo cks ▁were ▁combined ▁when ▁the ▁canal ▁was ▁restored ▁in ▁ 1 9 7 6 . ▁The ▁new ▁chamber ▁has ▁a ▁depth ▁of ▁, ▁making ▁it ▁Britain ' s ▁deep est ▁canal ▁lock . ▁Just ▁above ▁the ▁' deep ▁lock ' ▁is ▁an ▁area ▁of ▁water ▁en abling ▁the ▁lock ▁to ▁ref ill ▁and ▁above ▁this ▁is ▁W ash ▁House ▁Lock , ▁followed ▁by ▁Ab bey ▁View ▁Lock , ▁by ▁which ▁there ▁is ▁another ▁p ump ing ▁station ▁and , ▁in ▁quick ▁succession , ▁P ult ney ▁Lock ▁and ▁Bath ▁Top ▁Lock . ▁ ▁A bove ▁the ▁top ▁lock ▁the ▁canal ▁passes ▁through ▁Sydney ▁Gard ens ▁including ▁two ▁short ▁t unn els ▁and ▁under ▁two ▁cast ▁iron ▁foot brid ges ▁d ating ▁from ▁ 1 8 0 0 . ▁Cleveland ▁tunnel ▁is ▁ ▁long ▁and ▁runs ▁under ▁Cleveland ▁House , ▁the ▁former ▁headquarters ▁of ▁the ▁Ken net ▁and ▁Av on ▁Canal ▁Company . ▁A ▁trap - door ▁in ▁the ▁tunnel ▁roof ▁was ▁used ▁to ▁pass ▁paper work ▁between ▁cler ks ▁above ▁and ▁bar ge es ▁below . ▁ ▁Many ▁of ▁the ▁brid ges ▁over ▁the ▁canal ▁are ▁also ▁listed ▁buildings . ▁ ▁Victoria ▁Bridge ▁which ▁was ▁built ▁in ▁ 1 8 3 6 ▁across ▁the ▁River ▁Av on , ▁was ▁an ▁important