How many bridges, dams, roads and other key elements of our infrastructure are in dire needs of repair?Amplify???d from www.nytimes.comLAKE ISABELLA, Calif. ??? Frank Brassell, owner of Nelda???s Diner in this town wedged between the slopes of the southern Sierra Nevada, knows his fate should Lake Isabella Dam, a mile up the road, suddenly fail when the lake is full.