Segment B3 Long Tunnel Update The Surface Water Supply Project is currently advertising the Segment B3 Long Tunnel Construction Contract, which includes the construction of approximately 4.4 miles of 96-inch diameter treated water transmission line with necessary valves, various connections, and appurtenances. The proposed tunnel will initiate from a launching shaft near the intersection of Hopper Road and Shady Lane and extend 23,035 feet (4.4 miles) to a reception shaft positioned approximately 400 feet west of Interstate 45.  The tunnel will be within the Exxon Fee Strip for approximately 3.3 miles between Aldine Westfield Road and Sweetwater Lane. The tunnel design involves an approximate 11-foot diameter tunnel to be constructed on a 0.12 percent grade sloping down to the east. In general, the pipe grade will follow the natural slope of the ground surface.  Minimum depth to the tunnel crown is approximately 25 feet.  In general, the tunnel will be positioned approximately 5 feet inside the outer Fee Strip boundary to maintain maximum clear distance away from the existing pipelines.  Considering that the existing pipelines meander from one side of the Fee Strip to the other, the tunnel will cross under the shallow pipelines at five locations.  Details of this work are provided in the Construction Drawings and Project Manual made available on CIVCAST at
This project is a part of the overall Surface Water Supply Project.  An invitation to bidders is attached for download by clicking here  Copies of the RFQ documents may be reviewed and obtained from search WHCRWA Segment B3 Request for Qualifications.

COVID-19 Update and Resources

The WHCRWA and NFBWA have received a number of questions regarding the impact of COVID-19 on water supply. The Center for Disease Control (CDC) has issued a statement that the COVID-19 virus has not been detected in drinking water, and conventional water treatment methods that use filtration and disinfection, such as those utilized in the WHCRWA and NFBWA’s systems, should remove or inactivate the virus that causes COVID-19.

The WHCRWA and NFBWA’s operator, Inframark, has compiled a variety of resources to assist answering questions related to the impact of COVID-19 on drinking water, which are available at The WHCRWA and NFBWA teams will continue to actively monitor any developments and update this information as needed.

Ensuring reliable, long-term water supplies for west Harris County and north Fort Bend County, Texas

The Surface Water Supply Project

To meet the Harris-Galveston Subsidence District (HGSD) and Fort Bend Subsidence District’s (FBSD) groundwater reduction requirements for 2025 and beyond, the West Harris County Regional Water Authority (WHCRWA) has partnered with the North Fort Bend Water Authority (NFBWA) to construct the Surface Water Supply Project.

Once complete, surface water from Lake Houston will be supplied to retail water providers (MUDs, PUDs, WCIDs, etc…) in the WHCRWA and NFBWA by way of the City of Houston’s Northeast Water Purification Plant through through over 55 miles of pipeline and two large pump stations. These transmission pipelines will vary in diameter from 96 inches to 42 inches, depending on the pipeline segment.

Opportunities for Outreach

The Surface Water Supply Team provides multiple opportunities for you to receive information about the Project. You may email us at or call our project hotline at 1-844-638-SWSP (7977) for updates. We are available to provide presentations to your local organization (meeting in-person or virtually), as well. If you would like for the Project Team to reach out and provide project information, give us a call or email us today!

May 2020 Newsletter

Introducing the Surface Water Supply Project.

What to expect during construction.

The Mandate

The groundwater withdrawal in Harris and Galveston counties is regulated by the Harris-Galveston Subsidence District (HGSD), a special purpose district created by the Texas Legislature in 1975 for the purpose of reducing land subsidence.

The HGSD requires all water suppliers in Harris and Galveston counties to reduce groundwater pumping based on the rate of subsidence in their area. In the HGSD regulatory areas map shown, areas 1 and 2 have already converted to surface water. Area 3 requires conversion to alternate water via a 30% reduction of groundwater usage by 2010, 60% by 2025, and 80% by 2035.

HGSD and FBSD Regulatory Areas
30% reduction of groundwater usage by 2010
60% reduction of groundwater usage by 2025
80% reduction of groundwater usage by 2035


Construction will begin in early 2020. Contractors are currently conducting survey work and preparing for the start of construction. Although no pipeline segment will be affected for the entire three-year construction phase, construction is expected to be completed by 2024.

Construction Timeline
Design Phase
Segment Under Construction

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