CONSTRUCCION DE UN CUERPO NUEVO DEL LADO IZQUIERDO CON UN ANCHO DE CORONA DE 10.50 M. INCLUYE TRABAJOS DE TERRACERIAS OBRAS DE DRENAJE PAVIMENTACION OBRAS COMPLEMENTARIAS OBRAS INDUCIDAS Y SEÑALAMIENTO HORIZONTAL Y VERTICAL DEL KM. 54 860 AL KM. 100 000 DEL TRAMO: VILLA DE COS SIERRA VIEJA DE LA CARRETERA: ZACATECAS-SALTILLO EN EL ESTADO DE ZACATECAS.

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