State officials approved Mullen Trucking in Alberta to carry a load as high as
15 feet, 9 inches, according to the permit released by the state. However, the
southbound vertical clearance on the Skagit River bridge is as little as 14
feet, 5 inches, state records show. That lowest clearance is outside of the
bridge's vehicle traveling lanes, Transportation Department communications
director Lars Erickson said Friday. The bridge's curved overhead girders are
higher in the center of the bridge but sweep lower toward a driver's right side.
The bridge has a maximum clearance of about 17 feet, but there is no signage
to indicate how to safely navigate the bridge with a tall load.
At a news conference later Saturday, Hersman said Washington state does not
require signage unless the clearance is 14 feet, 4 inches or less.
The permit specifically describes the route the truck would take, though it
includes a qualification that the state "Does Not Guarantee Height Clearance. "