Construcciýn de la Limpieza y Desazolve del rýo Valle Nacional, en una longitud de 1,070 m. comprendiendo de los cadenamientos 1+330 al 2+400. Incluye el recubrimiento marginal en la zona del puente Valle Nacional en una longitud de 30 m. Municipio de San Juan Bautista Valle Nacional, Oaxaca

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