Overall site improvements to the visitor center and complete reconstruction of the visitor parking lots, storm drainage systems, and the almost seven-mile, two-lane roadway entering the park. The project scope included site SWPPP, demolition, parking lot reconstruction, critical vibration-sensitive drilling and rock excavation at depths of up to 25 feet for (3)-7200 Gal and (4)-450 Gal oil-water separators located directly above the caverns, (10) cast-in-place Type 5A inlets, 690 LF of 24” CMP, 165 LF, 36” CMP, 4,570 CY of roadway excavation, 40-120 Ft high rock slope scaling, 3,800 CY of export, 660 LF of 4” SDR-35 drainage line, 3950 LF of electrical conduit, installation of a concrete-encased, high-voltage duct bank, 12,000 LF of integral colored curb & gutter, 4,350 SY of integral colored sidewalk, ADA access improvements, flag pole relocation, park entrance sign construction, reconstruction of historical site masonry walls, site furnishings, sign and informational kiosks, 35,000 SY of subgrade preparation, 19,235 TNs of asphalt super pave, 107,890 SY of cold-recycled asphalt base course, striping, signage, import and placement of topsoil, and final site stabilization.
