After selecting First Transit as the system operator and a second from the Walter E. Washington Convention Center to the Southwest Waterfront .
The system operator is the DC Circulator started service in July 2005 with two routes : one along K Street from Union Station to Georgetown .
After selecting First Transit as the system operator , the DC Circulator started service in July 2005 with two routes : one along K Street from Union Station to Georgetown , and a second from the Walter E. Washington Convention Center to the Southwest Waterfront .