The American Placer Corporation office was established at Lee's Ferry in 1910 and abandoned the next year.
 In that interval, the company constructed a steamboat, the "Charles H. Spencer", named for the company's founder, to transport coal mined farther up the river to the company's amalgamation operation at Lee's Ferry.
The boat, in use for one year, was docked and finally sank in a 1921 flood.
Its remains are visible in the river, and it is separately listed on the National Register of Historic Places.

In 1922 the office building was re-occupied as the Lee's Ferry Post Office, but was abandoned in 1924.
Another brief use came in  1931.
The American Placer Corporation office was established at Lee's Ferry in 1910 and abandoned the next year.  In that interval, the company constructed a steamboat, the "Charles H. Spencer", named for the company's founder, to transport coal mined farther up the river to the company's amalgamation operation at Lee's Ferry. The boat, in use for one year, was docked and finally sank in a 1921 flood. Its remains are visible in the river, and it is separately listed on the National Register of Historic Places.
In 1922 the office building was re-occupied as the Lee's Ferry Post Office, but was abandoned in 1924. Another brief use came in  1931.
Lee's Ferry and Lonely Dell Ranch