Tests of the Port of Hood River Interstate Bridge lift span found it was in working order, and normal operations have resumed.  Port Executive Director Michael McElwee says the Coast Guard has been informed the span can operate for marine vessels moving down the Columbia River.  The Port has been examining the alignment of the lift span since a suspected allision last September in which a boat is suspected of hitting a bridge pier.  McElwee said two span guides on the south end that broke during testing were replaced by newer guides that use a roller to prevent the lift span from moving northward, resulting in better safety controls.  He adds the Port wants to restore a couple of stop systems for the lift span to increase the margin of safety.