As part of a prime Geotechnical Engineering contract with the TxDOT San Antonio District, Arias is currently providing Preliminary Geotechnical Engineering services for the I-35 NEX project in Bexar, Guadalupe and Comal counties. The project consists of expanding approximately 19.5 miles of I-35 from I-410 South to FM 1103 in Bexar, Comal and Guadalupe Counties, Texas including the construction of two non-toll 15-mile long bridges (elevated lanes) between the I-35 main lanes and frontage roads from I-410 South to FM 3009.

The elevated lanes will provide one high occupancy vehicle (HOV) lane and two general purpose lanes in each direction. The I-35 elevated lanes will provide direct connections to I-410 South, I-410 North, Loop 1604 West, and Loop 1604 East. The proposed improvements between FM 3009 and FM 1103 will include at-grade widening of the main lanes for the addition of two general purpose lanes. The project also includes the following incidental construction necessary to transition the elevated lanes and connectors with the existing highways including revisions to ramps and frontage roads and accommodations for drainage, utilities, signs and other highway improvements.

The preliminary engineering services includes geotechnical field boring logs, laboratory soil test results, ground penetrating radar (GPR) data, falling weight deflectometer (FWD) data, dynamic cone penetrometer (DCP) data, pavement coring and report log, and soil classifications with Atterberg limits. Potential Vertical Rise (PVR) exploration and mitigation feasibility recommendations and strategies, and recommended pavement rehabilitation methods and designs for new pavements