Larson Design Group (LDG) provided the preliminary and final design as well as the construction administration and observation for the replacement structure carrying Nichols Road over Rock Run in Cherry Township, Sullivan County, Pennsylvania. The replacement structure consisted of a single-cell, cast-in-place rigid frame culvert and cast-in-place wingwalls founded on bedrock. The design also included widening the approach roadway to 16’ with improvements to the existing parallel ditches and the installation of a guide rail.