However, Seattle faced massive unemployment, loss of lumber and construction industries as Los Angeles prevailed as the bigger West Coast city.
Seattle had building contracts that rivaled New York City and Chicago, but lost to LA as well.
Seattle was mildly prosperous in the 1920s but was particularly hard hit in the Great Depression, experiencing some of the country's harshest labor strife in that era.
Growth after World War II was partially due to the local Boeing company, which established Seattle as a center for aircraft manufacturing.
Seattle achieved sufficient economic success that when the Great Seattle Fire of 1889 destroyed the central business district, a far grander city-center rapidly emerged in its place.
The second and most dramatic boom resulted from the Klondike Gold Rush, which ended the depression that had begun with the Panic of 1893. Portland docked with its famed "ton of gold", and Seattle became the main transport and supply point for the miners in Alaska and the Yukon. However, it was Seattle's business of clothing the miners and feeding them salmon that panned out in the long run.
In a short time, Seattle became a major transportation center. Along with Seattle, other cities like Everett, Tacoma, Port Townsend, Bremerton, and Olympia, all in the Puget Sound region, became competitors for exchange, rather than mother lodes for extraction, of precious metals.
The boom lasted well into the early part of the 20th century, and funded many new Seattle companies and products. Casey borrowed 0 from a friend and founded the American Messenger Company (later UPS).