sentences:  It has been confused with the nearby Maria Pia Bridge, a railway bridge that was built 9 years earlier (and is located to the east), which is similar in aspect to the Luís I bridge.In 1879, Gustave Eiffel presented a project to construct a new bridge over the Douro, with a high single deck in order to facilitate ship navigation.This project was rejected due to dramatic growth of the urban population, which required a re-thinking of the limits of a single-deck platform.