I-240 (MemFix4)

The MemFix4 project in Memphis, TN used the CMGC (Construction Manager/General Contractor) delivery method to widen I-240 and replace and/or rehabilitate four structures while minimizing impacts to interstate traffic and the Norfolk Southern Railroad (NSR). It is Tennessee’s second-ever project to be completed using this delivery method.

Benesch completed a technical study for MemFix4 in 2015 to define the project’s scope and determine viability of the CMGC delivery method. In September 2016, design work began and Kiewit Infrastructure South Co. was selected as Construction Manager. The CMGC Team (TDOT, Benesch and Kiewit) worked collaboratively during design and continued their partnership throughout the project’s construction. CMGC delivery provided ample opportunity for implementing highly complex Accelerated Bridge Construction (ABC) techniques while yielding change orders at a significantly lower level than the industry average—especially on a project of this size and complexity.

In all, 18 months were cut from this $54 million project’s construction schedule. Design was completed in October 2017; lane closures first occurred in January 2018, with all original lanes open by the third weekend of December—less than 12 months later. Traditional delivery methods could have required three years to construct MemFix4. Through ABC and other innovative techniques, the CMGC team completed all construction activity in just 18 months.

With 180,000 vehicles and 20 freight trains passing through the corridor each day, the widened I-240 and associated structures are a boon to the travelling public. The corridor’s once aging infrastructure is now a showcase for innovative structural engineering techniques. With the added benefits of improved seismic performance and long-term flexibility, the project has set the stage for continued growth along I-240.