Route 364 Phase 3 Design-Build

St. Charles, MO

Services Performed

Bridges, Concrete Paving, Earthwork, Drainage, and MSE Walls

Project Owner



2014 MO/KS ACPA – Excellence in Paving – Urban Divided Highway Project

Project Overview

A Joint Venture that included Millstone Weber (MW) was selected in early 2013 for the design-build contract to construct Phase 3. This project involves construction of the Route 364 extension from the end of Phase 2 on the east to I-64 on the west. This design-build project consists of 17 bridges, 15 MSE walls, 9.5 miles of grading and pavement and 4 major intersections. The project team developed many innovative concepts to increase value for MoDOT as well as decrease traffic disruption to improve the overall MOT. For example, the team’s design utilized the existing Route N bridge to make the Route 364 tie-in to I-64/Route N rather than constructing a new flyover ramp, which was in MoDOT’s original proposal. As a result, this practical design approach allowed for significant scope to be added elsewhere on the project. In addition, the new Bryan Road bridge over proposed Route 364 was actually built to the west of existing Bryan Road instead of keeping the current alignment. This allowed traffic to remain on the existing Bryan Road alignment during the 5-month construction of the new bridge.

Once the new bridge was complete, the tie-ins were made to existing Bryan Road (north and south of the bridge) with minimal disruption to traffic. In addition to roadway geometric and bridge design, the scope includes traffic analysis, signalization, lighting, signing, striping, hydraulics/hydrology, floodplain mapping, geotechnical, a noise wall study, and pavement design. The design-build procurement was completed through a competitive best-value selection process. The Page Constructors Joint Venture proposal provided the best value to Missourians by delivering the design-build project within the program budget, maximizing improvements in the corridor, providing for compatibility with future expansion, minimizing and mitigating construction impacts during construction, maximizing work zone safety, providing a quality product resulting in a long-lasting transportation facility, and committing to completing the project ahead of the required December 1, 2014, completion date. During the proposal phase, the design team incorporated six MoDOT-approved alternate applicable standards (AAS) into the project to provide a best-value submittal, without impacting quality. Throughout the life of the project, MW worked with members of MoDOT’s project team on innovative traffic control ideas and phase changes, as well as value-engineering proposals to improve the project’s safety, schedule and costs.