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 mitigation during construction and the 84″ valve/ARV vault structures. Both were adopted by the NHCRWA on the other three segments.