Aerial view of Westside MAX Washington Park station site. World Forestry Center is at top of photo. Equipment, workers and the prepoured stairs are lowered to the working platform by crane. Looking over the edge of the western Washington Park shaft, the top of the slipform can be seen. On the third level of the slipform, freshly set concrete is revealed as the form inches upward.
Workers use a hose to pour concrete into the outer lining of the shaft.
A precast stairway is put into position flight by flight. A cutaway view of the slip form lining operation by artist Steve Katagiri.