douglas navigationとは 意味・読み方・使い方

The Douglas Navigation was a canalised section of the River Douglas or Asland, in Lancashire, England, running from its confluence with the River Ribble to Wigan. Authorised in 1720, it opened in 1742, but its working life was short, as it was bought out by the Leeds and Liverpool Canal Company in 1772, to prevent a rival scheme to build a canal to Wigan. It was connected to the Leeds and Liverpool once that was open, but the upper river into Wigan was replaced by a parallel canal cut, and the lower river was replaced by the Rufford Branch, which utilised part of the river channel near its mouth. The navigation was abandoned by 1801, as the canal provided a better route to the River Ribble.