Progressive Design-Build Water Treatment Plant Project Underway in Texas

In order to meet the needs of a growing population and to shift from reliance on groundwater to surface water as the source for its drinking water, the city of Houston and four regional water authority partners are undertaking a 320 million gallons per day $1.765-billion Design-Build expansion of the Northeast Water Purification Plant. It is the largest progressive Design-Build water treatment plant project underway in Texas and in the United States. McCarthy Building Companies, Inc., through the Houston Waterworks Team, was awarded three separate contracts on the project—the early works central plant foundations package, which broke ground in June 2018, the raw water intake pump station, which began in early 2019 and the balance of the central plant, which started in August 2019. The NEWPP project’s first 80 MGD phase will be in operation in early 2023, the balance of construction work will be complete in 2024 and the overall 320 MGD plant will be in full operation in early 2025.

McCarthy’s involvement on NEWPP project consists of three distinct construction work packages that will allow for an additional 320 million gallon per day capacity. First is the early works central plant foundations package, which consists of furnishing, as well as installing all rebar and structural concrete, embeds, pipe penetrations and under-slab process mechanical piping on the west filter module and transfer pump station facilities. The second package is for the construction of a 30,000-square-foot raw water Intake Pump Station building, which includes an access bridge, constructed on pilings 1,000 feet from the shore within the middle of Lake Houston.

The third package includes the balance of construction of the central plant, which will consist of a full build-out of the two facilities already underway as part of the early works package to complete Phase 1, as well as the rest of the filters, the second transfer pump station and post-chemical facilities for Phase 2. As part of the central plant work, McCarthy is building the largest filters in Texas.

Throughout the project, McCarthy’s team will self-perform several aspects of the job including:

• Process piping
• Process equipment installation
• Pile driving
• Concrete work
• Metal installation
• Earth work