 In order to build the extension, the river was diverted into a new channel further to the east between Rufford and Tarleton Bridge, and the old channel was re-used by the canal.From that time, only the lower portion of the river, from Tarleton to the confluence with the Ribble remained in use.Because Edward Holt had retained his two shares, the Leeds and Liverpool Canal accounted for the Upper and Lower Douglas Navigation sections separately to the main canal, so that profits could be apportioned appropriately.