Aerial survey project no. 77S-25 was flown on April 22, 1977. These photos are a verbal scale of 1"=250'. The flight line follows a north-south direction and provides coverage for highway 14 and bridge 4411 1.7 miles west of Sleepy Eye. ASP No. 77S-25 includes index sheet 1. The index indicates the focal length is 152.46mm but the air photos read 152.47mm.
