 The Elma Sub starts in Centralia, Washington, Milepost 5, and ends in Hoquiam, Washington, Milepost 75.This subdivision handles traffic to and from the Port of Grays Harbor including grain, autos, soda ash, soybean, garbage, manifest, and local trains.Shelton Subdivision

The Shelton Subdivision stretches from Elma, Washington to Shelton, Washington and is approximately 26 miles in length.