When rain events occur, the turbidity, organics and alkalinity of the water in Lake Houston can change drastically, making it challenging for the city of Houston to treat.
One of largest progressive design-builds in North America, the City of Houston in association with four regional water authorities is expanding its Northeast Water Purification Plant (NEWPP) from 80 million gallons per day (mgd) to 400 million by 2024.This two-phase expansion will deliver the new North Treatment Plant facilities as part of a plan to more than triple the plant’s output of fresh drinking water, dramatically increase Houston’s ability to support steady residential and commercial growth while reducing dependency on groundwater and meeting a mandate to restrict groundwater usage as well as helping two subsidence districts.
As part of the expansion, the Houston Waterworks Team – a joint venture between CDM Smith and Jacobs Engineering – is designing and constructing the new raw water facility, including intake, pumping and conveyance to withdraw raw water from Lake Houston and deliver it about 1.5 miles away to the expanded NEWPP.
Balfour Beatty was selected to perform part of the NEWPP Early Work Package 6 North Plant, and more recently, the North Plant 12 through a competitive sealed proposal, a combination of qualifications, project technical knowledge and pricing.
Features of the Early Works Package 6 include:
- Pre- and post-treatment chemical addition
- Flocculation and sedimentation basins
- Ozone treatment
Features of the North Plant 12 include:
- Pretreatment Facilities
- Flocculation and Sedimentation Basins
- Recycle clarifiers
- Ozone Treatment
- Gravity Thickeners
- Liquid Oxygen (LOX)
- Vertical Shaft Mixers
- Chlorine Dioxide Generators
- Pumps, Gates and Air Compressors
- Electrical buildings
- 80,000 Cubic yards of cast in place concrete
Total Project quantities for the North Plant consists of:
- Excavation – 122,000 cubic-yards
- Backfill – 85,000 cubic-yards
- Formwork – 1.7M square-feet
- Waterstop 72,000 square-feet
- Concrete – 80,000 cubic-yards
- Chemical Coatings – 106,000 square-feet
- Chemical Piping – 132,000 square-feet
- Valves – 850 each
- Electrical Conduit – 94 miles
- Electrical Wire – 392 miles
The $300M North Treatment Plant is part of a $1.4B project that began in the fall of 2017. Four partner agencies share portions of the cost, including North Harris County Regional Water Authority, Central Harris County Regional Water Authority, West Harris County Regional Water Authority and North Fort Bend Water Authority.