TDR ULTRA Corrugated HDPE Pipe Loop 1604 North Expansion Corridor, San Antonio, TX

Highway Drainage San Antonio

TDR Pipe supplied TDR ULTRA® corrugated HDPE pipe for highway drainage in San Antonio, Texas on the Loop 1604 North Expansion Corridor, an approximately $1.4 billion TxDOT project to expand and modernize one of the region’s most critical transportation arteries. TDR provided 4-inch through 60-inch dual-wall HDPE pipe totaling 5,660 linear feet for the corridor’s stormwater improvements.

Project overview

The Loop 1604 North Expansion Corridor is a major infrastructure project led by the Texas Department of Transportation (TxDOT), representing an investment of approximately $1.4 billion to expand and modernize one of the most critical transportation arteries in the San Antonio metropolitan area. The project includes roadway widening, interchange reconstruction, and comprehensive drainage improvements to support increased traffic capacity and long-term regional growth. On a highway program of this magnitude, drainage is safety-critical infrastructure engineered to strict state standards.

The Challenge: A $1.4 Billion Multi-Phase Corridor
A project of this scale brought demanding conditions: a large-scale, multi-phase construction environment, coordination across multiple crews and segments, and variable topography and drainage requirements along the corridor. Above all, the work required strict compliance with TxDOT standards and specifications at every phase. The drainage system had to deliver durability under heavy traffic loads, resist environmental degradation, and maintain efficient hydraulic performance across a corridor being rebuilt in stages while traffic kept moving.

Highway Drainage in San Antonio — The TDR ULTRA® Solution
A high-performance HDPE storm drainage system—TDR ULTRA® pipe—was selected to meet the demanding requirements of a large-scale highway project. Its high structural capacity handled highway load conditions, its corrosion and abrasion resistance suited long-term roadway exposure, and its smooth interior wall delivered optimal flow efficiency. The full diameter range from 4 to 60 inches let the system serve everything from small collection lines to major trunk conveyance, while reduced installation time versus traditional materials helped keep the multi-phase schedule on track. TDR Engineering supported the project with adaptable solutions and technical guidance throughout.

Installation and TxDOT Compliance
Material selection and installation complied with applicable TxDOT drainage standards and roadway specifications. Because the corridor was built in phases across variable topography, TDR provided technical guidance to adapt pipe sizing and alignment segment by segment, coordinating with multiple crews. The lightweight HDPE pipe reduced installation time compared to traditional materials, supporting the pace of a $1.4 billion program executed by DNT Construction LLC.

Conclusion and Long-Term Value
The Loop 1604 North Expansion Corridor showcases the successful integration of advanced drainage solutions within a large-scale transportation project. The use of HDPE piping, combined with engineering support from TDR, ensures long-term performance and infrastructure reliability—protecting a modernized regional artery built to carry San Antonio’s traffic and growth for decades.

About TDR ULTRA® Corrugated HDPE Pipe
TDR ULTRA® is a dual-wall corrugated high-density polyethylene (HDPE) pipe engineered for gravity-flow stormwater drainage. It combines a smooth interior liner for hydraulic efficiency with a reinforced, annular corrugated exterior and a co-extruded integrated bell for watertight joints. Available in 4-inch through 60-inch diameters, TDR ULTRA® meets AASHTO M294 and ASTM F2306, with watertight joints tested per ASTM D3212—making it well suited to highway, transportation, industrial, and commercial drainage projects across Texas.