Flagstaff Festival of Science: Evening Lecture - The 1935 Fairchild Aerial Surveys of Lower Grand Canyon

Riordan Mansion State Historic Park

September 22, 2018   7:00 p.m.

Presented by: Richard Quartaroli, Grand Canyon Historical Society

In 1935 as Boulder/Hoover Dam is being completed and Lake Mead is beginning to be filled, the Soil Conservation Service contracted with Fairchild Aerial Surveys, Inc., to provide aerial photography and mapping. The main purpose was to monitor sediment inflow and water storage capacity. Head boatman Frank Dodge leads boatmen Owen Clark and Merrill Spencer (and sometimes boatmen Eustace and Smith) down the Colorado River from Diamond Creek to Pearce Ferry on two trips, carrying a survey crew to provide ground reference points. The only known pictograph near river mile 237 on river left provides a reference point to research the little-known details of these two trips, 30 and 4 days to move 55 miles downriver.

Riordan Mansion State Historic Park, 409 W. Riordan Rd., Flagstaff, AZ 86001, 928-779-4395. This is a free event!