This update just in from King County Wastewater Treatment, which is overseeing the 53rd Avenue Pump Station project at 53rd/Alki:

In order to excavate to the full depth necessary for pump station construction, King County’s contractor has brought in large machinery which must be set in the pedestrian and bike path adjacent to the construction site. During the week of September 22, pedestrians and cyclists will be shifted to the sidewalk on Alki Ave. SW. The temporary shift is necessary to provide a safe pathway for the public. Flaggers will be on site during work hours to assist pedestrians and cyclists.