There will be single lane closures on the Hood River-White Salmon bridge today (Thursday) as Port crews work to repair new potholes in preparation for the approach ramp work that will close the bridge for three days.  Flaggers will direct traffic around the moving work zone until the work is complete.  Beginning on Friday, the bridge will be closed to all traffic for a 72-hour period beginning at 12:01 a.m. Friday morning through 11:59 p.m. Sunday night.  The closure will allow for repair of the on-ramps to the bridge on both sides of the Columbia River.  The work had been planned for two weeks ago, but was pushed back due to wet weather at that time.