Portland, Oregon-based inland water freight company Shaver Transportation has become the first tug and barge operator on the U.S. West Coast to participate in Green Marine, the leading voluntary environmental certification program for North America’s maritime industry. “We want to be proactive and believe that Green Marine will be able to guide us toward continual improvement in the environmental performance of each of our vessels through the program’s detailed framework,” Shaver Transportation President Steve Shaver said. “It is important to us that our fleet operates in the most safe and sustainable manner possible.” To gain certification, which will be independently…