. >> james jacobson is as bridge engineer. his worse enemyis salt. >> it is better to catch it earlier overtime. salt watercan penetrate through the concrete and causes the concrete to break away. it is a good idea of how well they are doing in the district, the bay bridge is considered deficiency, thatmeans it needs to be replaced with 16, 000 cars coming across daily >> they are going to build i bigger and better. >> improve concrete that'll help the bridge lasts 75 years of life. in the meantime, if bridges have problems, inspections will be done more than every two years. >> we inspect it every year and every six months. >> the bridge in clear water is good to go, built in 2005. >> yeah, this bridge is in good shape >> according to a national report, 98% of all of florida's, more of 12, 000 bridges in good condition. >> it gives me pride that our infrastructures are in good shape. abc action news. >> well, we posted a list of all bay area bay bridge bridges and their conditions on our website. as tom ex explains, they are