The Port of Hood River will be conducting emergency repairs due to vandalism of the control room and north tower of the Hood River/White Salmon Interstate Bridge in late September.  The vandalism included graffiti, cut wires, knobs, and destruction of a navigation light.  Port Executive Director Michael McElwee says it appears the repairs will be relatively easy, but it will lead to increased bridge closure periods during October.  Next Monday and Tuesday the bridge lift span will be fully tested, leading to closures of up to one hour in duration at multiple times during the day and night, and on October 12 there will be a full closure from 11 p.m. to 3 a.m. for strain gage testing on the liftspan.  Then previously planned truss and floorbeam repair work will take place from October 11th to the 25th, which will require intermittent single lane closures of the bridge for up to two weeks.