The nation’s road agency said that the bailey bridge that will carry one lane of Circunvalación traffic over a giant washout would be finished late Thursday.
The span will be 55 meters long, about 180 feet. The bridge is of modular design, and nine of the anticipated 18 panel have been bolted together, the agency, the Consejo Nacional de Vialidad, said in a morning summary.
But Mother Nature may be working faster. The agency said that the ground where the shoulder of the four-lane highway washed out this week was continuing to erode. Eventually there will be two spans side by side to carry one direction of traffic. Contractors are on the job 24 hours a day, and a lot of the work has been below the highway where efforts are being made to halt the erosion and stabilize the soil, said the road agency.
The highway is being closed in both directions from 8 p.m. to 5 a.m. to give work crews room to do their jobs. The closure is from the traffic signal in Hatillo 8 to a ramp that leads to Ruta 27, the San José-Caldera highway.
At other times there have been three lane in use. Eventually all the lanes will be going over these temporary bridges while workmen excavate the ground underneath to construct a permanent solution. The site is at the Río María Aguilar one of the metro area’s major rivers.