The Hood River-White Salmon Interstate Bridge will be closed to all vehicle traffic for several nights in April for replacement of the lift span motors.  The work requires a large crane lift of heavy equipment to the top of both lift span towers.  The bridge will be closed between the hours of 9:30 p.m. and 5 a.m. on the nights April 9, 10, 17, and 29th.  Related work will also require some intermittent daytime closures on certain dates in April.  On April 3 and 4 there will be intermittent daytime single lane closures from 8 a.m. to 4 p.m. with expected delays of 20 to 30 minutes and flaggers on the bridge directing traffic.  On April 25 and 26 there will be intermittent full bridge closures and span lifts from 8 a.m. to 4 p.m. with delays of 30 to 40 minutes, plus flaggers and lift span gates to control traffic.