The bridge leading from Pajaro into Watsonville hasn't been repaired since it was damaged in the 1989 Loma Prieta earthquake. But just feet away from that battered bridge--almost in defiance of the broken-down reminder of the quake that rocked and wrecked this small community of 3,500--stands a bright row of neighborhood businesses that were freshly painted last summer by volunteers who came all the way from Mechanicsburg, Penn.