THE DERWENT VALLEY WATERWORKS. (INCLUDES PLATES AT BACK OF VOLUME).

Keywords: VALLEYS, WATERWORKS, WATER, WATER SUPPLY, RESERVOIRS, GATHERING, GROUNDS, GEOLOGY, WORKS, CONSTRUCTION, MASONRY, DAMS, QUARRIES, TEMPERATURE, CRACKS, IRREGULAR, METHODS, BENDING, PRESSURE, AQUEDUCTS, PIPES, PIPELINES, WELLS, INLETS, OUTLETS, SIPHONS, TUNNELS, ROUGHING, FILTERS, BEDS, CLEANING, GRAVEL, SAND, SERVICE, TOWNS, CITIES, CEMENT, TESTING, CUT AND COVER, COSTS, FILLING, CONCRETE, FILL, DERWENT VALLEY, ENGLAND, DERBYSHIRE, HOWDEN, DERWENT, AMBERGATE, UK