CDOT I-25 North Express Lanes Design-Build

Overview

The CDOT I-25 North Express Lanes Design-Build project increased highway capacity, mobility, and safety by reconstructing 14 miles with new express lanes in both directions between Johnstown and Fort Collins, CO. In the process, Kraemer replaced 11 aging bridges, straightened highway curves to improve safety, and made major utility and drainage improvements, including adding two mobility hub transit facilities. Kraemer self-performed earthwork and drainage operations encompassing over twomillion cubic yards of embankment, 40,000 feet of pipe and onemillion square yards of pavement. Scope entailed reconstructing 15 irrigation structures, a state-of-the-art bus rapid transit (BRT) station, three interchanges reconfigurations, six major overpass structures, and five in-line structures in both directions of I-25. With the BRT station in the center of I-25, Kraemer developed a design for safe pedestrian access, bus separation from vehicles, a park-in-ride facility, station platforms and canopies, and phasing that minimized impacts to the public and existing transit operations. Kraemer collaborated with our environmental designer to implement environmental mitigation measures for stormwater run-off, dewatering, protection of endangered species habitat and historic resources. Fourteen miles of new fiber optic background, CCTV cameras, VMS boards, automatic traffic recorders, and lighting along the corridor were added. To minimize public impacts, Kraemer devised multiple work packages around traffic phasing, irrigation season work periods, flood plain approvals, and other surrounding projects. Kraemer partnered with the Great Western Railway to reconstruct an at-grade crossing without impacting critical train schedules.