Aerial survey project no. 77S-27 was flown on April 22, 1977. These photos are a verbal scale of 1"=250'. The flight lines provide coverage for highway 15 and bridge 4750 over the Cottonwood River 2.5 miles south of New Ulm. ASP No. 77S-27 includes index sheet 1. The index indicates the focal length is 152.46mm but the air photos read 152.47mm.
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