Cause of August 2018 pipeline failure in Richardson reported to City Council

Richardson pipe rupture
In the days after the pipeline rupture, water district crews worked to repair the damaged infrastructure. (Courtesy North Texas Municipal Water District)

In the days after the pipeline rupture, water district crews worked to repair the damaged infrastructure. (Courtesy North Texas Municipal Water District)

The North Texas Municipal Water District has released the cause of the massive underground pipeline rupture that flooded several homes in Richardson last year.

The incident occurred Aug. 30, 2018, in the Knolls of Breckinridge, a subdivision in northeast Richardson. The failure of a 72-inch underground pipeline caused a 6-foot geyser to erupt through Crystal Mountain Drive, damaging 13 homes and displacing many residents, including Council Member Ken Hutchenrider.

In the months following the incident, the district commissioned two engineering firms—Halff Associates and Freese & Nichols—to conduct independent forensic analyses of the failed segment, according to Deputy City Manager Don Magner, who presented the findings to City Council on Dec. 2.

Both studies found cracks in the exterior mortar of the pipe are what ultimately led to the rupture. Those cracks could have occurred during construction of the pipe, he said. They also could have happened during construction of the subdivision, a time when underground pipes are exposed to unusually heavy loads, Magner said.

“If there was a crack when [the pipe] went in at construction, additional weight would have the likelihood of opening it up,” he said.


Those cracks allowed moisture to seep into the infrastructure and cause a degradation of wires used to strengthen and protect the pipe, Magner said.

Neither study found any issue in terms of design of the pipeline, which dates back to 1979, Magner said. However, it is possible that the pipe’s wiring had microcracks at the time of manufacturing, increasing the likelihood of fractures if exposed to moisture, he added.

“Degradation that occured on those wires, over time, finally gave through,” he said.

Underground pipelines experience varying levels of pressure on a daily basis, but that is not what caused the failure, the studies found.

“Had it not been for this series of events, the crack in the mortar, the water degrading the wire, the wire having microcracks that made it more susceptible, this rupture would not have occurred simply based on operations,” Magner said.

As a result of the incident, the water district also commissioned Pure Technologies to conduct a comprehensive analysis of the 60- and 72-inch lines that encompass the North Garland Pipeline system, which stretches from Wylie to Richardson and also includes small portions of Plano and Garland.

Within the city of Richardson, there are 14 miles of water lines operated by the water district. The majority of that infrastructure comprises 60- or 72-inch pipelines, Magner said.

Of the 6,000 segments of pipe inspected, Pure Technologies identified five segments as having some level of wire degradation, Magner said. Those segments have been recommended for repair or replacement, and all work should be done by next summer. Only one of those segments was located in Richardson, near the intersection of Renner and Brand roads. The remainder are located in Garland.

The analysis also identified six leak locations, all of which have since been repaired, Magner reported.

Moving forward, the district has agreed to do a similar comprehensive assessment every five years, Magner said. The city will work closely with the district on future inspections and analysis of pipeline, he added.
SHARE THIS STORY
By Olivia Lueckemeyer

Olivia Lueckemeyer graduated in 2013 from Loyola University New Orleans with a degree in journalism. She joined Community Impact Newspaper in October 2016 as reporter for the Southwest Austin edition before her promotion to editor in March 2017. In July 2018 she returned home to the Dallas area and became editor of the Richardson edition.


MOST RECENT

texas capitol building fotolia stock image
Public education the focus of upcoming forums with candidates for the Texas Legislature

The events are hosted by nonprofit advocacy group Raise Your Hand Texas Foundation.

Former President George W. Bush will speak at the Feb. 21 event. (Courtesy George W. Bush Presidential Center)
Former President George W. Bush to speak at annual Richardson Chamber of Commerce meeting

Guests should expect heightened security leading up to this year's event.

Texas oil and gas industry could see a major slowdown in 2020

The oil and natural gas industry paid a record-setting $16.3 billion in taxes and royalties to local governments and the state in 2019, the Texas Oil and Gas Association announced Tuesday.

Nature's Mercantile   CBD Store opened in January. (Tracy Ruckel/Community Impact)
Nature's Mercantile + CBD Store opens Richardson location

The business offers a variety of CBD and health products.

Plano ISD will be expanding its full-day pre-K program and removing the option of half-day need-based classes. This will allow for a more eligibility among under-served families, according to a presentation Jan. 14 at a district board meeting. (Liesbeth Powers/Community Impact Newspaper)
Plano ISD moves to full-day only pre-K classes, meeting Texas requirements and expanding program

Pre-K classes at Plano ISD will see a shift to a full-day only program, as well as an expansion in the number of classes and host campuses in the 2020-21 school year.

Richardson City Council discussed proposed changes to its mobile food vendor ordinance at its Jan. 13 meeting. (Courtesy Adobe Stock)
Talk of changing food truck ordinance underway in Richardson

Council is scheduled to vote on the amendments Jan. 27.

Richardson is competing in a statewide fitness challenge. (Courtesy Adobe Stock)
Richardson competes for grant money in community fitness challenge

The It's Time Texas Community Challenge is an eight-week community fitness competition that is open to the public.

Le Beauty Spa
Le Beauty Spa brings advanced skin care to Richardson

The business offers a wide range of beauty services, such as customized facials, organic teeth whitening and eyelash extensions.

The first of DART's community meetings will be on Jan. 21 at Cypress Waters. (Gavin Pugh/Community impact Newspaper)
Transit agency to hold meetings to update communities on 26-mile Silver Line project

Dallas Area Rapid Transit is inviting communities along the historic Cotton Belt railroad to learn more about their 26-mile passenger rail project.

Two for the Money BBQ is opening in late January. (Courtesy Adobe Stock)
Restaurateur Dale Wamstad to open Two for the the Money BBQ in January in Richardson

The restaurant is the latest culinary project by Wamstad, owner of the adjacent Texas chophouse.

Back to top