Constructed in 1933, the Petrified Wood Park Museum is built with walls of petrified logs and original flooring made of petrified grass and reeds, with wall bases up to 9 feet thick in places. An addition was built in 1987 to house more historical items. The museum contains an extensive collection from both prehistoric and modern history, including a faux fireplace made of petrified wood, a 1930s classroom, and a late 1800s carriage, with items donated by local people or loaned by various families. John Rafferty and Carl Jorgenson took part in construction phases of the museum in 1933. In the summers of 2000 and 2001, a city-hired group of workers led by Harold Severson and Max Myhre restored structures in the park, chiefly by chipping out and replacing the mortar between the rocks.