TOTE Vessel Shore Power
Port of Tacoma
Tacoma, WA

The U.S. Environmental Protection Agency awarded the Port of Tacoma a $1.5 million Diesel Emissions Reduction Act (DERA) grant for ship retrofits and additional electrical shore power connections at the Totem Ocean Trailer Express, Inc. (TOTE) terminal to reduce diesel and greenhouse gas emissions.


Wood Harbinger provided design, programming, and construction support services for the waterfront electrical infrastructure system and relay protection system, which allow ships to completely shut down their onboard diesel generators and be powered entirely by shore side electricity. This eliminates the diesel matter and greenhouse gasses that are emitted from ships while docked.

Our design team removed the existing 480V shore power and installed new 6,600V shore power switchgear, underground distribution ducts, protective relays, transformers, and power factor correction equipment. The relay protection system programming enables enable vessel crew members to parallel a ship’s utility systems with the shore power and transfer the electrical load without any momentary loss of electricity. To accomplish this, our design required that that shipboard and shore power protective relays communicate with each other over fiber optic cable to allow remote operations and control.

During construction, Wood Harbinger helped the project team adhere to the tight schedule required to meet the hardline funding date. We performed frequent site inspections, providing on-site answers to contractor inquiries, assisting with testing, and reviewing test reports.