Veterans Memorial Overpass

Location: Tucson, AZ     Client: PCDOT     Status: Completed

Pima County Department of Transportation (PCDOT)has rebuilt the Veterans Memorial Overpass in Tucson , Arizona. The contracting company performing the construction submitted a value-engineering (VE) proposal to replace all Cast-in-Place (CIP) retaining walls on the Veterans Memorial Overpass (VMO) with Mechanically Stabilized Earth (MSE) walls. PCDOT retained NCS to assist with the evaluation of the VE proposal.

Update 5/15/08: NCS is currently performing a task under our as-needed contract with Pima County to review survey monitoring data collected at the VMO project site.

Update 2/17/2006: NCS has been presended with a certificate of appreciation by Pima County for our work on the VMO project. For more details, visit the Awards page.

As part of this evaluation, NCS’ scope of work included the following tasks:

• Setup the criteria for MSE wall design and modify the ADOT spec as necessary.
• Review of the VE design concepts including checking MSE wall design calculations and drawings, providing comments and/or recommendations, and comment/recommendation resolution.
• Site meetings during VE evaluation.
• Construction Inspector Training
• Field support during construction
• Setup of instrumentation plan and reduction of data

The Veterans Memorial Overpass consists of a single-span bridge over the Tucson Diversion Channel, and a multi-span bridge over a divided highway and Union Pacific Railroad tracks. For the abutments for the multi-span bridge spread footings on top of MSE walls are used.

This project has been constructed and is in service.