The U.S. Coast Guard is asking the public, and mariners in particular, to weigh in on navigation at Portage Bay Bridge in Seattle. The agency has issued a public notice for Washington Department of Transportation’s request to replace the bridge near Lake Union and is looking for vessel and facility owners and operators and others in the maritime community to discuss navigation needs that the proposed bridge project should meet. “This includes but is not limited to mariners' requirements for horizontal and vertical navigation clearances, placement of bridge protective systems, bridge lighting systems and various other safety measures,” the agency…