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Alliance Regional Water Authority Phase 1B Treated Water Pipeline


Lockhart, TX

Delivery Method

Best Value



Client Type


Project Type

  • Pipeline
34.4 miles of cross-country pipeline
30 miles of fiber optic installation
332 LF of subaqueous micro-tunneling

The Phase 1B Treated Water Pipeline includes multiple pipeline segments of a large water supply project for the Alliance Regional Water Authority (ARWA). This system will supply treated water to rapidly growing communities in Texas, including Kyle, Buda, San Marcos, and Green Valley.

Upon completion, the pipeline’s Segment A will transport water from the ARWA water treatment plant in East Caldwell County to Lockhart, Texas, spanning nearly 17 miles of cross-country 42-inch and 48-inch pipeline, where it will connect to Segment B, which spans nearly 17.4 miles. The project also includes 30 miles of fiber optic installation between ARWA’s raw water infrastructure, water treatment plant, Segment A pipeline, Segment B pipeline, and booster pump station

The trenchless portions of the segments include over 1,500 linear feet (LF) of hand tunneling with 66-inch and 60-inch steel casing and a 332-foot micro-tunnel that crosses under Plum Creek with 52-foot vertical shafts.

Access was one of the biggest challenges to overcome, with some stretches of easement running for over 12,000 LF with no immediate access. With varying elevations, getting material staged in the correct positions required immense coordination between crews, suppliers, and subcontractors.

This project, using funding programs provided by the Texas Water Development Board, will mark a significant milestone in the ARWA’s commitment to providing sustainable water solutions to the rapidly growing communities across Central Texas. This achievement will not only ensure a reliable supply of treated water but also exemplify the positive impact infrastructure projects can have on the well-being and prosperity of communities, fostering a sustainable and thriving future.