The Texoma to Wylie Water Treatment Plant Pipeline Extension Project in Texas was recently named a 2016 Public Works Project of the Year by the American Public Works Association (APWA). The project is being honored with APWA’s Project of the Year award in the Disaster or Emergency Construction/Repair in the more than $75 million category. For the 2016 Project of the Year award, the team of winners includes the North Texas Municipal Water District (NTMWD) as the managing agency; Garney Construction, as the primary contractor; and Freese and Nichols, Inc., as the primary consultant, who will be presented with the award at the APWA PWX 2016 conference Awards Ceremony in Minneapolis, MN during August 28-30, 2016.
The APWA Public Works Projects of the Year awards are presented annually to promote excellence in the management and administration of public works projects, recognizing the alliance between the managing agency, contractor, consultant and their cooperative achievements. This year, APWA selected projects in five categories including Disaster/Emergency, Environment, Historical Restoration/Preservation, Structures, and Transportation.
The Texoma to Wylie Water Treatment Plant Pipeline Extension project was created in response to two emergencies: the environmental emergency caused by the presence of zebra mussels, an invasive species, in Lake Texoma, and the emergency resulting from loss of 28 percent of water supply during a severe drought.
In 2009 when mussels occurred in Lake Texoma, the North Texas Municipal Water District that provides water for 1.6 million North Texans via municipalities and other wholesalers—lost approximately one quarter of its raw water supply.
Pumping from Lake Texoma, which flows into Lake Lavon, posed a potential for infestation of Lake Lavon, also used for raw water storage. The U.S. Army Corps of Engineers (USACE) ceased pumping until it permitted reopening of NTMWD’s Lake Texoma pumping station.
In response, the NTMWD commissioned studies of potential solutions to restore the raw water supply and prevent further infestation. Ultimately, none of the treatment options could guarantee total removal of the mussels before discharge into Sister Grove Creek. The only practical way to protect the creek and Lake Lavon and resume the raw water supply was to transport the water directly from Lake Texoma to the District’s water treatment plant in Wylie, where conventional water treatment would destroy the zebra mussels. As this scenario emerged, NTMWD explored ideas for accomplishing design and construction of an emergency pipeline, pumping station and balancing reservoir to bypass Lake Lavon.
The fast-tracked design and construction for the project was scheduled for completion within 2.5 years. The project was designed on a highly accelerated schedule of 13 months, and the design phase was coupled with selection and contracting with a Construction Manager at Risk (CMAR), which enabled execution of the longest lead time prior to final design, avoiding delays. Eight months into the design, the CMAR was able to begin the process for ordering pipeline materials.
The Pipeline Extension Project includes approximately 48 miles of 84-inch and 96-inch pipeline from the existing pipeline near the Sister Grove Creek outfall to NTMWD’s water treatment plants in Wylie. The project also includes design and construction of a 240-MG earthen balancing reservoir and modifications to the four existing water treatment plants to facilitate blending of the raw water sources. The overall system transports 120 MGD of Lake Texoma water to Wylie, and has the capability to carry an additional 70 MGD of Lake Texoma water if needed, to a future water treatment plant near Leonard.
For more information on the APWA 2016 Projects of the Year, or for a complimentary press pass to the APWA PWX 2016 conference in Minneapolis, please contact APWA Media Relations and Communications Manager, Laura Bynum, firstname.lastname@example.org, or call 202.218.6736.
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