River Calder, Lancashire
…of the River Ribble in Lancashire, England, and is around 20 miles (32 km) in length. Starting in Cliviger, its source is very close to that of the West Yorkshire river with the same name, and that of the River Irwell. It flows northwest through the Cliviger Gorge supplying two fish ponds near Pot Oven Farm, before collecting Green Clough…