FILE - In this May 8, 2013 file photo, bridge engineer Brian Maroney explains the testing they are planning on the steel rods on the new span of the Bay Bridge during a press conference at the Metropolitan Transportation Commission in Oakland, Calif. Officials overseeing construction of the San Francisco-Oakland Bay Bridge are scheduled to be questioned Tuesday, May 14, 2013 during a hearing in Sacramento to address construction problems and the overall structural integrity of the $6.3-billion project. (AP Photo/The Tribune, Laura A. Oda, File)