 In 2011 The Port of Grays Harbor saw a steady increase in business due to it being the only deep sea port near Seattle.The line from Centralia, Washington to Grays Harbor, Washington now has unit grain, soy bean, soda ash, auto, garbage, and military trains in addition to their regular local traffic.BNSF Railway and Union Pacific Railroad locomotive power are considered home on the PSAP as they run through on these unit trains to Grays Harbor, Washington for unloading.