William O. Douglas,
Utah v. United States (403 U.S. 9…
“ But that again does not detract from the basic finding that the lake served as a highway and it is that feature that distinguishes between navigability and non-navigability.There was, in addition to the boats used by ranchers, one boat used by an outsider who carried sheep to an island for the owners of the sheep. It is said that one sheep boat for hire does not make an artery for commerce; but one sheep boat for hire is in keeping with the theme of actual navigability of the waters of the lake in earlier years. ”
