During that time, five vessels have served the crossing, including the Martha S., which operated from 1948 to 2013, and the current ferry, the M/V Sanpoil.

[5] The L. A. McLeod, a Diesel powered side-wheeler, served the crossing from 1939 to 1944, a period which saw the completion of the Grand Coulee Dam and the formation of Lake Roosevelt.

Between 1944 and 1948, the route was served by a barge called the San Poil, which was pushed by a tugboat, the Ann of Wilbur.

[9] It was christened, received a tribal blessing, and began service on August 14, 2013, after the Martha S. docks were refit to handle the larger replacement vessel.

[11] The project to acquire a replacement ferry for the Martha S. was funded by the Washington State Legislature during the 2011 session.