Work to repair six overhead lateral beams on the Hood River-White Salmon Interstate Bridge that were damaged by a boom on a truck hitting them in late June is on schedule.  Nighttime bridge closures that started last week and run each night from 7 p.m. to 7 a.m. will continue for a few more days.  Port Executive Director Kevin Greenwood says work has progressed as planned, with actual replacement of the beams to take place in the early part of this week.  Greenwood also said it is possible they might be able to get the work done a day or two early if everything goes smoothly.