, ▁while ▁the ▁lock ▁chamber ▁at ▁La de ▁Bank ▁P ump ing ▁Station ▁has ▁been ▁re used ▁to ▁house ▁extra ▁p umps . ▁Many ▁of ▁the ▁structures ▁built ▁as ▁part ▁of ▁R enn ie ' s ▁upgrade ▁in ▁the ▁early ▁ 1 8 0 0 s ▁surv ive ▁in ▁near - original ▁condition , ▁and ▁are ▁Gra de ▁II ▁listed . ▁ ▁Geography ▁The ▁area ▁in ▁which ▁the ▁dra ins ▁lie ▁is ▁fen land , ▁most ▁of ▁it ▁at ▁about ▁sea ▁level , ▁and ▁is ▁bounded ▁to ▁the ▁south ▁west ▁by ▁the ▁River ▁With am ▁and ▁to ▁the ▁south ▁east ▁by ▁a ▁low ▁s ilt ▁r idge ▁of ▁marine ▁origin ▁which ▁separ ates ▁it ▁from ▁The ▁W ash . ▁The ▁northern ▁boundary ▁is ▁defined ▁by ▁Con ings by ▁to ▁the ▁north ▁west , ▁Sp ils by ▁and ▁the ▁southern ▁edge ▁of ▁the ▁Lincoln shire ▁W olds ▁to ▁the ▁north , ▁and ▁W ain f le et ▁and ▁the ▁Ste eping ▁River ▁to ▁the ▁north ▁east . ▁It ▁is ▁divided ▁into ▁the ▁East ▁Fen ▁and ▁the ▁West ▁Fen , ▁separated ▁by ▁a ▁strip ▁of ▁higher ▁ground , ▁some ▁ ▁long ▁and ▁ ▁wide , ▁on ▁which ▁are ▁situated ▁the ▁villages ▁of ▁St ick ford , ▁St ick ney ▁and ▁Sib sey . ▁The ▁A 1 6 ▁road ▁follows ▁this ▁higher ▁ground , ▁which ▁is ▁gla cial ▁in ▁origin . ▁Histor ically , ▁the ▁south ▁western ▁section ▁of ▁the ▁West ▁Fen ▁close ▁to ▁the ▁River ▁With am ▁was ▁called ▁the ▁Wild more ▁Fen , ▁but