Construction crews are close to breaking ground for the new $139 million Mukilteo ferry terminal.

Work on the new terminal, set to be built on the old Mukilteo tank farm site one-third of a mile east of the current terminal, is slated to begin in September, according to a press release from Washington State Ferries.

Construction crews will begin work on the new terminal’s trestle and bridge seat.

The terminal project, called The Mukilteo Multimodal Project, includes a new passenger and maintenance building, a transit center near the Sounder commuter rail station and four new toll booths.

According to Washington State Ferries, replacing the tank farm pier also removed “thousands of tons of toxic creosote-treated debris” from Puget Sound.

To mark the groundbreaking, the agency is hosting a celebration from 10 a.m. to noon on Wednesday at the construction site. Speakers are invited to discuss the project, including Congressman Rick Larsen and Island County Commissioner Helen Price Johnson.

The location is 789 Front Street, Mukilteo. Parking will be provided onsite.

For more information about the terminal project, visit http://www.wsdot.wa.gov/projects/ferries/mukilteoterminal/multimodal/.