Port of Amsterdam is busy constructing its new sea lock in IJmuiden. According to the port’s website see link they are now busy with the connection of the lock sill to the lock gate chamber of the inner head, dredging work in the new lock chamber, and the construction of the eastern part of the flood barrier on the north side. In addition, the activities on the walls of the inner lock head will continue throughout July and August 2020.

This is a photo taken a few weeks ago:

IJmuiden Photo