Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Dolores County, Colorado Dolores County, Colorado Dolores County is the seventh-least populous of the 64 counties of the U.S. state of Colorado. As of the 2010 census, the population was 2,064. The county seat is Dove Creek. It is thought that the area has been the site of human habitation since at least 2500 B.C. Dolores County's western portions were densely populated between 900 and 1300 AD. Population estimates of as many as 10,000 population, with villages of hundreds of rooms, have been made by archaeologists and other researchers. But this population was destroyed or migrated elsewhere, apparently following a drought and severe