Just got this via an alert from Washington State Ferries, whose Fauntleroy dock is next to King County’s Barton Pump Station work zone: Pile-driving is expected to start next Monday (April 15th), meaning “an increase in noise and vibration in the project area.” According to the project website, this work is expected to be done within four days (by April 18th). A construction notice with even more details can be seen here.