I-25 Reconstruction SH-119

This Colorado Department of Transportation project reconstructed 4 miles of I-25 between SH 119 and SH 66. The project scope included removal of the existing pavement with major grading and drainage improvements to accommodate widening from 4 to 6 lanes, 247,000 square yards of 13” thick PCCP, removal and replacement of 5 bridges, traffic signalization and electrical work, 100 acres of seed and mulch, extensive erosion control, asphalt patching, 9 miles of fencing, retaining walls, 11 miles of rumble strip grinding, pavement marking and traffic control.

Originally designed in 12-phases, IHC’s Value Engineering proposal reduced the phases to 2. The north end I-25 tie-in was also changed from the original asphalt-designed section to PCCP. This provided a permanent section that will not have to be removed for the future I-25 widening, with the increased shoulder widths providing a safer roadway section. In addition, IHC constructed two pilot sections of Roller Compacted Concrete (RCC) for evaluation of this technology as a final wearing surface for special CDOT applications.

All existing concrete pavement was recycled on site, removed and crushed to produce the aggregate course underlying the new PCCP. In addition, all existing asphalt pavement was milled by the project asphalt subcontractor and hauled to his plant site for future recycling.

The project received the CO/WY Chapter ACPA Gold award for Divided Highways – Urban, the CDOT Region 4 Project Management award and the American Concrete Institute, Rocky Mountain Chapter award for the Transportation and Outstanding Project of the Year.