id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-5963		Roman engineering - Wikipedia			.html	text/html	3418	455	67	Roman engineers used inverted siphons to move water across a valley if they judged it impractical to build a raised aqueduct. Large diameter vertical wheels of Roman vintage, for raising water, have been excavated from the Rio Tinto mines in Southwestern Spain. The Romans built many dams for water collection, such as the Subiaco dams, two of which fed Anio Novus, the largest aqueduct supplying Rome. Tanks for holding water are also common along aqueduct systems, and numerous examples are known from just one site, the gold mines at Dolaucothi in west Wales. The Romans were the first to exploit mineral deposits using advanced technology, especially the use of aqueducts to bring water from great distances to help operations at the pithead. Water wheel technology was developed to a high level during the Roman period, a fact attested both by Vitruvius (in De Architectura) and by Pliny the Elder (in Naturalis Historia). Roman aqueducts and Water supply (2nd ed.).	./cache/en-wikipedia-org-5963.html	./txt/en-wikipedia-org-5963.txt