▁form ulated . ▁Richard ▁Hamm ett , ▁a ▁local ▁man ▁from ▁Street , ▁was ▁commission ed ▁to ▁conduct ▁a ▁survey ▁of ▁the ▁route ▁in ▁ 1 8 2 6 . ▁Hamm ett ▁had ▁experience ▁of ▁building ▁a ▁man ure ▁canal ▁through ▁pe at ▁he ath land . ▁He ▁considered ▁two ▁main ▁routes ; ▁the ▁first ▁followed ▁the ▁course ▁of ▁the ▁River ▁Br ue , ▁but ▁was ▁rejected ▁on ▁the ▁grounds ▁of ▁engineering ▁costs , ▁and ▁the ▁inter ference ▁with ▁its ▁d rain age ▁function . ▁The ▁second ▁route ▁followed ▁the ▁South ▁D rain , ▁which ▁had ▁been ▁newly ▁constructed ▁following ▁flo ods ▁in ▁ 1 7 9 4 , ▁to ▁connect ▁with ▁the ▁River ▁Br ue ▁near ▁C ri pp s ▁Bridge , ▁and ▁to ▁re - use ▁the ▁old ▁course ▁of ▁that ▁River ▁at ▁High bridge ▁to ▁create ▁a ▁bas in . ▁ ▁Hamm ett ▁estimated ▁that ▁the ▁main ▁work ▁required ▁on ▁the ▁section ▁from ▁High bridge ▁to ▁the ▁South ▁D rain ▁would ▁be ▁the ▁provision ▁of ▁a ▁to w path . ▁After ▁this , ▁the ▁South ▁D rain ▁would ▁need ▁to ▁be ▁made ▁wider ▁and ▁deeper , ▁but ▁this ▁would ▁aid ▁its ▁d rain age ▁function , ▁and ▁would ▁reduce ▁the ▁le vy ▁on ▁the ▁local ▁land own ers , ▁as ▁the ▁canal ▁company ▁would ▁then ▁be ▁responsible ▁for ▁its ▁maintenance . ▁Two ▁lo cks ▁would ▁be ▁required ▁on ▁this ▁upper ▁section , ▁with ▁a ▁total ▁rise ▁of ▁just ▁. ▁He ▁did ▁not ▁believe ▁that ▁cutting ▁a ▁canal ▁through ▁pe at