▁of ▁Old ▁Mill . ▁It ▁was ▁the ▁same ▁height ▁as ▁Old ▁Mill ▁and ▁double d ▁the ▁size ▁of ▁the ▁complex . ▁De cker ▁Mill ▁was ▁completed ▁in ▁time ▁to ▁explo it ▁the ▁economic ▁bo om ▁in ▁the ▁cot ton ▁trade ▁that ▁followed ▁the ▁brief ▁peace ▁in ▁the ▁war ▁with ▁France ▁from ▁ 1 8 0 2 – 1 8 0 3 . ▁During ▁its ▁construction , ▁the ▁steam ▁engine ▁was ▁replaced ▁a ▁more ▁powerful ▁ 4 0   hp ▁B oul ton ▁and ▁W att ▁engine . ▁ ▁After ▁the ▁completion ▁of ▁the ▁An co ats ▁section ▁of ▁the ▁Ro ch dale ▁Canal ▁in ▁ 1 8 0 4 , ▁raw ▁materials ▁no ▁longer ▁had ▁to ▁be ▁moved ▁by ▁cart . ▁Co al ▁and ▁cot ton ▁could ▁be ▁moved ▁directly ▁into ▁the ▁complex ▁and ▁there ▁was ▁a ▁readily ▁available ▁supply ▁of ▁water ▁for ▁the ▁steam ▁engines ▁from ▁the ▁private ▁bas in ▁on ▁the ▁canal . ▁The ▁entrance ▁tunnel ▁to ▁the ▁bas in ▁was ▁set ▁ 9 0 ° ▁to ▁the ▁canal , ▁with ▁a ▁short ▁arm ▁on ▁the ▁opposite ▁side ; ▁and ▁as ▁the ▁canal ▁is ▁only ▁ ▁wide , ▁it ▁pos ed ▁navigation ▁problems ▁for ▁canal ▁boats , ▁which ▁could ▁be ▁ ▁in ▁length . ▁It ▁is ▁possible ▁that ▁cargo ▁was ▁transferred ▁to ▁smaller ▁vessels ▁for ▁the ▁journey ▁between ▁the ▁canal ▁and ▁the ▁complex ▁bas in . ▁ ▁Const ruction ▁of ▁New ▁Mill ▁was ▁probably ▁completed ▁in ▁ 1 8 0 4 . ▁It ▁measured ▁ ▁by ▁ ▁and ▁as ▁with ▁the