[1][2][3] Construction on the massive facilities required by GPI began on July 10, 1944, and continued for seven months, finally ending on January 30, 1945.
[1] GPI was overseen by the Special Projects Division,[6] part of the U.S. Army Biological Warfare Laboratories.
[5] The M33 cluster bomb was used in a series of tests from August–October 1952 at GPI, with the Army Chemical Corps exposing over 11,000 guinea pigs to Brucella suis.
[10] By 1985 only two surviving structures remained at GPI: a pump house and an underground "igloo storage building".
[10] Transportation resources at GPI included an airplane landing strip and 22 miles (35 km) of surfaced roads.