The Project is located in the city of Piedras Negras, Coahuila and consists of the rehabilitation of the Marginal Collector located near the Rio Grande and the rehabilitation of manholes in the sanitary wastewater collection system of the locality. The Project includes: a) The installation of 126 meters of high-density polyethylene pipes of 30 and 36 inches and the rehabilitation of 3 manholes. Additionally, it includes the replacement of 226 meters of laterals and the necessary works for the protection of the pipe in specific areas. b) Rehabilitation of 154 manholes in the sanitary wastewater collection system of the locality.