84″ Water Transmission Line (Project 25D), IH-45 to W. Sharmon Rd

Aurora designed approximately 9,300 LF of 84” water transmission line along easements and CenterPoint (CPE) Corridor. The project was a part of North Harris County Regional Water Authority’s (NHCRWA) 2025 water supply system plan, a multi-year project that will carry water from the City’s Northeast Water Purification Plant (NEWPP) to a new SH 249 Regional Pump Station and Storage Facility.

The project faced several key challenges: (1) multiple tunnel crossings of BW8, CPE high voltage transmission lines/towers, and gas/petroleum pipelines (2) crossing of the active Woodgate fault, and (3) multiple private properties with recent developments.

During the initial project phase, Aurora conducted a Route Study to assess the feasibility of various alignments. As a result, Aurora obtained approval from the NHCRWA with a recommended final alignment which shortened the BW-8 tunnel crossing from 2,000 LF long at a skewed angle to 500 LF at an optimal perpendicular angle while minimizing impact on the recent developments. Aurora developed the protocol for AC current mitigation during construction and the 84″ valve/ARV vault structures. Both were adopted by the NHCRWA on the other three segments.