Integrated Pipeline (IPL) Segment 15-1 – Tarrant Regional Water District

Navarro County Texas

The award-winning Integrated Pipeline (IPL) Program consists of more than 150 miles of raw water pipeline to connect several North Texas reservoirs in the Tarrant Regional Water District (TRWD) and Dallas Water Utilities (DWU) systems. The program represents a large scale collaboration between the two agencies in an effort to realize significant long-term construction and operational savings for constituents.

LAN designed Section 15-1 which includes more than 15 miles of 108-inch diameter raw water pipeline, spans more than 70 private parcels, and includes 15 stream crossings, 15 road crossings, and one railroad crossing. Seven crossings were designed with tunneling methods which required design coordination with TxDOT, Navarro County, and Union Pacific Railroad.

The project was completed $19 million below the preliminary project budget.

At a glance

$93 million construction

15 miles of raw water transmission

108-inch diameter pipe

7 tunnel crossings

Awarded Small Projects Award of Merit by Engineering News-Record Texas & Louisiana



First segment constructed for IPL program

Interconnection with Richland-Chambers pipeline crossing

Extensive agency coordination


Pipeline Design

Water Supply & Transmission

Trenchless Construction


Tarrant Regional Water District

Related Work

LAN City of San Antonio Soledad Main Street

Transportation Services

trenchless method identification, tunnel shaft design

Water Supply & Transmission