the decade beginning in 1911 was the last of the great steamboat era on the columbia river. during this time, "bailey gatzert" ran mostly on excursions up the columbia gorge through the cascade locks and to the dalles, as part of the dalles, portland and astoria navigation company, also known as the regulator line. the regulator line was controlled by the spokane, portland and seattle railway, which was also known as the north bank road.