Piethorne Reservoir

Piethorne Reservoir is the largest of several reservoirs in the Piethorne Valley above Newhey, by Milnrow, in the Metropolitan Borough of Rochdale, Greater Manchester, England. It was built between 1858 and 1868. During excavations at Piethorne in the mid-19th century, a Celtic spear-head with a 5-inch (130 mm) blade was unearthed, implying human habitation in the locality during the Bronze Age.