Port of Tacoma officials announced Tuesday the heavy haul corridor along State Route 509 through the Port industrial area has been temporarily extended by two miles through June 2013. The Washington State Department of Transportation (WSDOT), City of Tacoma and Port recently signed an amendment to the original agreement that established the route in December 2005. Special permits are required to use the heavy haul corridors serving the Port. To move a sealed, overweight container along SR 509, complete the WSDOT permit available online here. For information about moving cargo between Port terminals and local transload facilities, click here.