Cannon Block, Grand Junction, Colorado Intersection of 5th and Main Streets Grand Junction Mesa Colorado 81501 USA Part of Main Street that reflected Victorian architectural styles. It consisted of the Mesa County Bank building built by William Thomas Carpenter in 1890, and another building built by Benton Cannon in 1892. According to researcher David Sundal, the buildings were constructed of sandstone mined near Basalt, and floated down the Colorado River by barge to Grand Junction when the Colorado carried a much large volume of water than it does now. yes yes