Assertion: aqueduct's gradient | /r/CapableOf | sustain steady flow of water
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Source sentences:
text: The Fontaine d'Eure, at 76 m (249 ft) above sea level, is only 17 m (56 ft) higher than the repartition basin in Nîmes, but this provided a sufficient gradient to sustain a steady flow of water to the 50,000 inhabitants of the Roman city.