Port of Portland Terminal 5 - Project Otter

This project included capturing and storing rainwater from the potash shipping terminal to prevent pollution from entering the Willamette River.

The project consisted of catch sheets, gutters, and gravity drains to a central sump suspended from structural steel framing hanging from the terminal. Stormwater is then pumped—using a duplex sump pump system—from the terminal to an infiltration basin on land. We provided fabrication and installation of stainless-steel gutter and stormwater drainage pipe system, sump, and pump station to the new infiltration basin.

Work was performed mostly over water and included install work from a barge suspended over the river from a lift for suspended as well as buried gravity and pressure piping. Work also included a directional bore under a rail line for the buried pressure piping to the infiltration basin as well as heat trace to avoid pipe freezing.

We carefully planned the work and logistics to anticipate ships docking with minimal notice and stopping work until the ship loading/unloading was complete. The active rail loop on site also required careful coordination during earthwork and buried piping activities.