Pier 4 also had a warehouse measuring 300 by 80 feet, with a cargo storage capacity of 8,000 tons.

The first Pier 4, built in 1900, collapsed in September 1901, causing the loss of at least 1700 tons of freight.

Its first tenant, the Arlington Dock Company, was a shipping agent for passenger steamships to several West Coast cities and to Alaska, Asia and Europe.

In 1912 the pier was the terminal for local steamboat lines running to Poulsbo and Liberty Bay, Washington.

Structural improvements were made at that time by Melvin O. Sylliaasen[3] and in the 1960s by the engineering firm Harvey Dodd and Associates.