The North Tarrant Express (NTE), Segments 1 and 2W, is a $2.55 billion, 13.3-mile design/build CDA project consisting of a series of major improvements to the IH-820 and SH-121/SH-183 corridor in Northeast Tarrant County. TexTerra was awarded a contract to perform the subsurface exploration and geotechnical engineering design and analysis for Segment 2W, which consists of 6.9 miles of SH-121/SH-183 from IH-820/Northeast Interchange east to Industrial Boulevard. TexTerra completed approximately 400 borings for a total depth of approximately 16,000 feet. Extensive laboratory testing program consisting of soil classification, unconfined compression, consolidated undrained (CU) triaxial with excess pore water pressure measurements, direct shear, one-dimensional consolidation, was performed to determine the engineering properties of soils and rock encountered. TexTerra completed the geotechnical engineering design for over 220 MSE walls, 40 bridges, pavements, and associated structures. External and global stability analyses were performed using procedures described in the FHWA publication, titled “Mechanically Stabilized Earth Walls and Reinforced Soil Slopes Design & Construction Guidelines”. MSE wall settlements were also calculated based on type of fill, wall height, consolidation properties of foundation soils. During construction, TexTerra re-designed several MSE walls due to changes of conditions, using both ASD and LRFD methods.