We’ve been tracking work on the new King County Water Taxi dock at Seacrest – next step, the gangway. Its components arrived at the end of the week, after the concrete dock was towed in (see our previous story/photos here) and secured. And you may soon see the new vessel on the West Seattle-downtown run, the Rachel Marie, because King County Transportation Marine Division communications manager Susan Whitmore says it’s being brought into Puget Sound this week, after leaving the Ballard shipyard where it’s been getting ready for its new role (see our “sneak peek inside tour” story here). Whitmore says the crew – county employees, now that the service is no longer operated by Argosy – starts work two weeks from tomorrow and will be training until the new season begins on April 5. 6:48 PM UPDATE: Seems the Rachel Marie didn’t wait till next week – we’re told it was seen out and about today, and Zack sent this photo of the RM docked at Pier 50 this evening, now sporting the KCWT branding, next to its counterpart Melissa Ann, which makes the Vashon-downtown run:

9:31 PM UPDATE: The explanation comes in comment and on our Facebook (WS Blog) page – the Rachel Marie will fill in on the Vashon-downtown run because of mechanical trouble that took the Melissa Ann out of service.