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This document is a detailed engineering calculation and design package for a 60-foot snowmobile bridge by Kleinschmidt Associates for ARC Enterprises in Kingfield, Maine, dated May 2002. The calculations include comprehensive structural analysis, load combinations, and member section forces for various bridge components. Key design considerations include accounting for dead load, snow load, snowmobiles, wind load, and potential moving loads (labeled as "groomer" loads).

The technical documentation includes multiple detailed drawings (elevation, cross-sections), structural member calculations, and analytical tables tracking forces, displacements, and stress across numerous bridge structural elements. Material specifications show the bridge will use STL (steel) members in various sizes including W8x13, WT8x13, and WT5x6, with a total material weight of approximately 8.593 kg. The design utilizes RISA-3D Version 4.5 structural analysis software and follows AISC ASD 9th Code standards for structural engineering calculations.