West Lincolnway

 

Project Focus

Exit from I-25 onto West Lincolnway (US-30) and you are at the Gateway to Cheyenne. This major business artery was in great need of improvement, but monetary shortages delayed it for almost five years. Stimulus funding allowed the rebuilding of 1.59 miles of West Lincolnway to include four lanes, a turn lane and landscaped median. The Wyoming Department of Transportation project was constructed in cooperation with the City of Cheyenne, Sema Construction as Prime Contractor and Interstate Highway Construction responsible for the concrete paving, shoulder curb and gutter and median landscape walls.

Project Details

Schedule
The project bid in May of 2009, with specified completion by October 15, 2010. Built in two phases, paving of the west bound lanes occurred in October and November, 2009. Cold and snow conditions required a boiler to heat the PCCP water. After the winter downtime, the east bound lanes reached completion on May 31, 2010.

Complexity
One of the busiest routes in Cheyenne, Lincolnway is the access to downtown and includes the Little America Resort. Specifications required all business access to be maintained at all times. Where possible, traffic was routed to allow entire intersections to be paved and re-opened to traffic in two days.

Innovation
The design called for 9" PCCP over 12" of subgrade and 6" of base. WYDOT accepted a proposal changing to a 6" base of recycled concrete placed on triaxial geogrid, providing both a cost savings and schedule acceleration. This recycling also contributed a "green" element by eliminating the need for hauling new material.

The median consisted of 20" plain landscape walls with sloping rundowns transitioning into Type A curb and gutter islands. This was the only 20" design available that was National Cooperative Highway Research Program 350 crash tested. The City accepted a proposal to stain and use a splitfaced block formliner to texture the concrete. With over 40 monuments and light pedestals throughout the islands, surrounded by white stone and an assortment of shrubs and trees, these medians have become the showcase of the project.

Quality Control
The paving contractor's internal quality control plan was supplemented with a project-specific QC plan. Due to the Fall and Spring cold, wet conditions, special attention was required at the plant for batching with warm water, and cold weather protection at the slab. Key personnel at the batch plant and paver are trained to monitor uniformity test results for slump, unit weight, air content, aggregate gradations and moisture content. A QC technician based at the placement site monitored and controlled the delivered mix. The attention to detail achieved 98% of the available incentive for both smoothness and strength-thickness-air.

Safety
Weekly safety meetings were attended by all the paving personnel, with special meetings convened prior to major construction events. This project received a safety award from the Wyoming Contractors Association.