Attachment 1 - Location Map, Plans, Details.pdf

This file contains engineering drawings and specifications from the Illinois Department of Natural Resources for repairs to the Tunnel Hill State Trail bike path in Johnson County, Illinois (IDNR File No. 5-24-009). The project involves repairing flood-damaged trail surfaces, including new concrete paving over existing aggregate trail sections, installation of drainage improvements, and modifications at a culvert location. Key construction elements include a depressed trail section at Station 1+85, installation of RR-4 riprap embankments, and protective measures for the Sugar Creek Bridge which must accommodate concrete trucks limited to 5.0 cu. yd. loads and aggregate trucks limited to 15.0-ton loads.

The project specifications detail material quantities including 77 cubic yards of concrete, 225 tons of CA-6 shoulders/bedding/leveling material, 200 tons of RR-4 riprap, 4,120 square feet of reinforcement wire mesh, and 160 linear feet of No. 4 rebar. Construction access is only available from the north at New Burnside, with the next road intersection approximately 6 miles south at Tunnel Hill. The contractor is permitted to construct a temporary gravel turn-around (20' x 35') alongside the trail for equipment access, though this and other temporary protection measures are considered incidental costs to the project.