sh 130 toll (segments 5 & 6)

travis & caldwell counties, Texas

This project was the first design-build “concession model” project ever constructed in Texas. The project was 41 miles long (Mustang Ridge to northeast of Seguin near IH 10) and had a development cost of $1.35 billion dollars. There were three direct connectors including those at SH45 SE north of Mustang Ridge, US 183 north of Lockhart and at IH 10.  It passes through Travis, Caldwall and Guadalupe counties. Portions of the highway have a posted speed limit of 85 mph, the highest posted speed limit in the United States.

Aguirre & Fields was responsible for design of 16 bridges in and around the US 183 interchange including the NB US183 to SB SH130 direct connector. Three of the smaller overpass bridges were designed with skews in excess of 50 degrees. Five post-tensioned concrete straddle bents in excess of 100’ long were utilized within the US 183 interchange. 

Aguirre & Fields developed optimized bridge elements sizes compared to standard TxDOT sizes at the request of the Owner. Contract technical provisions required that bridge designs needed to satisfy AASTHO LRFD specifications but were less prescriptive on following standard TxDOT detailing practice. Aguirre & Fields developed design procedures for out-of-state offices not familiar with normal TxDOT practice, resolved review comments with TxDOT at over-the-shoulder meetings, and was integral to the development of design tools used by bridge design teams, including spreadsheets and Design Task Protocols. For example, a precast TxGirder chart was developed for selecting the girder type based on girder spacing and span length.

 Additionaly, Aguirre & Fields designed all 32 of the project’s retaining walls.  The majority of the retaining walls were mechanically stabilized earth (MSE) systems while there was one drilled shaft retaining wall. Aguirre & Fields also designed numerous miscellaneous foundations for Segments 5 & 6 including those used for high mast illumination poles, large signs, and overhead gantries.

Photos Courtesy of AECOM