Caltrans engineers are still trying to determine the extent of damage to a traffic tunnel at the junction of the 2 and 5 freeways nearly three weeks after a tanker truck carrying 8,500-gallons of fuel caught fire in the passageway. The highway agency has not said when it expects the tunnel connecting the northbound 2 Freeway to the northbound 5 Freeway to reopen.
Caltrans workers have been testing samples of concrete to determine its strength, and holes have been drilled into the freeway structure to allow a camera to be inserted for a closer view of potential damage, according to Caltrans District 7.
Meanwhile, a private contractor has been working in nearby storm drains to remove sediment tainted with gasoline. Flaming fuel from the tanker flowed through the storm drains and under the streets of Elysian Valley before entering the bed of the L.A. River.
Another round of testing is still needed before Caltrans can determine what kind of repairs need to be made. The second phase, according to a Caltrans press release, involves radar:
The second phase of testing will include the use of a ground penetrating radar (GPR) and an impact echo device to determine if there is additional cracking within the concrete inside of the walls, ceiling, columns, and pavement.”