"Bonnington" would break the three-deck pattern and, with "Nasookin" and "Sicamous" become the only sternwheel steamer with four decks to run in the Pacific Northwest. These three vessels were built with deck called the "gallery" deck above the saloon and below the Texas deck. This was called the "gallery" deck because the cabins on it opened onto a walk or gallery that overlooked the dining room on the saloon deck below. This created high ceiling in the dining room and was a dramatic architectural effect.