Workers spent the last two weeks making the walls of the tunnel boring access pit to reach the stuck Bertha tunneling machine watertight. Now digging of the pit has resumed. The pit, which will be 120 feet deep when complete, is now 90 feet deep. Crews are now alternating between digging and sealing the pit walls.
Workers have also nearly finished a large rectangular crane which will be used to lift the cutting head.
(more on the progress of retrieving Bertha...)
