FOLLOWUP: Port reminder that window for Terminal 5 pile driving opens next week

(Display from July 10th ceremonial groundbreaking at T-5)

The Port of Seattle/Northwest Seaport Alliance is reminding neighbors today that the window for pile-driving on the Terminal 5 modernization project is about to open. From the letter they’re circulating:

In-water work, including in-water pile driving, is limited to the period between August 15 and February 15 in order to minimize effects on migratory fish. Upland pile driving can and will occur outside the time frame for in-water pile driving.

The Terminal 5 permit conditions restrict pile driving to the following times:

• 8 a.m. to 5 p.m. weekdays
• 9 a.m. to 5 p.m. Saturdays
• 9 a.m. to 5 p.m. on Sundays and legal holidays for vibratory pile driving only
• No impact pile driving is allowed on Sundays or federal holidays (except for two Sundays within each August 15 to February 15 period, restricted to 9 a.m. to 5 p.m.).

For comments and questions, the port offers these contact methods:

• Terminal 5 community phone line: 206-787-6886
• Email:

It’s been a month since the project’s ceremonial groundbreaking (WSB coverage here). The first phase of the project is expected to be complete in 2021, and that’s when T-5 will resume handling international cargo.

4 Replies to "FOLLOWUP: Port reminder that window for Terminal 5 pile driving opens next week"

  • anonyme August 9, 2019 (3:33 pm)

    I’m sure orcas won’t be at ALL affected by either the pile driving or the onslaught of monster ships come 2021.  But let’s blame sea lions for their demise – if we even have a J-pod in two years time, that is.

  • dsa August 9, 2019 (5:28 pm)

    I do not remember the port specifically saying “Impact Pile Driving” before now,   Ka-Boom, Ka-Boom, Ka-Boom.   For some reason I thought they had planned on the vibratory type.  They seem to have taken the DEIS and FEIS off line, so can’t check back.

  • dsa August 9, 2019 (7:37 pm)

    It sure is.  The previous links are gone.  Anyway this is what I overlooked from the DEIS in the construction impact section:  “... the unique nature of impact pile driving noise can result in the loudest sounds being audible at the residences nearest this activity. This noise could be perceived by some people as intrusive and possibly annoying, but the low overall levels would minimize the potential for impacts…”  They should have stopped at annoying.

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