massive gravity dam
61Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
62river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
63Operation Chastise — Part of the Second World War The Möhne dam on the day following the attacks …
64harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
65sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
66Johnstown Flood — The Johnstown Flood disaster (or Great Flood of 1889 as it became known locally) occurred on May 31, 1889. It was the result of the failure of the South Fork Dam situated 14 miles (23 km) upstream of the town of Johnstown, Pennsylvania, USA, made …
67Megastructure — Not to be confused with Superstructure. For other uses, see Megastructure (disambiguation). The Great Wall of China is a megastructure. This picture was taken near Beijing in winter. A megastructure is a very large manmade object, though the… …
68environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
69Massachusetts Water Resources Authority — The Massachusetts Water Resources Authority (MWRA) is a public authority in the Commonwealth of Massachusetts that provides wholesale drinking water and sewage services to certain municipalities and industrial users in the state, primarily in the …
70Dates of 2004 — ▪ 2005 January It turns out we were all wrong, probably, in my judgment. David Kay, former U.S. chief weapons inspector in Iraq, in testimony to the U.S. Senate Armed Services Committee, January 28 January 1 Haitian Pres. Jean… …
