Aerial survey project no. 77S-24 was flown on April 22, 1977. These photos are a verbal scale of 1"=250'. The flight lines provide coverage for highway 14 and bridge 5182 over Sleepy Eye Creek 0.6 miles west of Cobden. ASP No. 77S-24 includes index sheet 1. The index indicates the focal length is 152.46mm but the air photos read 152.47mm.
