The Puente Ingeniero Ernesto Uriegas, best known as the Puente de Fierro, is a twin-span bridge found along Vía Morelos Avenue, in San Cristóbal, Ecatepec de Morelos, State of Mexico. The bridge was built to cross the Gran Canal del Desagüe that surrounds Mexico City. The origins of the construction of the bridge tend to differ depending on the source as there are few records of the bridge beyond undated pictures.