One of our readers, Daniel, sent us this photo of the second portion of the 520 pontoon as it neared the Ballard Locks. The pontoon sections will be coming through the Locks often, as about 70 pieces are needed for the 520 bridge project.
More info on the 520 bridge project can be found here. Click here for a video of the first section of the pontoon as it passed through the Locks this weekend.