CORRESPONDENCE ON THE DERWENT VALLEY WATERWORKS.

Keywords: EMBANKMENTS, VALLEYS, WATERWORKS, DAMS, WATER, CONCRETE, CEMENT, FILTRATION, FOUNDATIONS, PROBLEMS, SERVICE, RESERVOIRS, GEOLOGY, TRENCHES, GAUGES, RAIN, RAINFALL, CEMENT, SAND, CLEANING, FILTERS, PIPELINES, PIPES, WATERTIGHT, FLEXURE, PRESSURE, WATER SUPPLY, MASONRY, CITIES, ASPHALT, LININGS, EARTHWORKS, TEMPERATURE, CRACKS, SOFT, LIMESTONE, COSTS, DERWENT VALLEY, DERBYSHIRE, ENGLAND, PENNINES, UK