solved one of the main reasons why the existing cast iron was failing. Many of those mains would fail due to shifting soils caused by the extreme heat and lack of moisture in the soils. Oklahoma and Texas generally deal with both freeze/thaw and dry/wet cycles causing severe breaks in the old pipe. " Th e EPWWS general manager came to one of our other pre-chlorinated pipe busting projects in Texas to get acquainted with the technology. He knew that this work was coming up. Eagle Pass, like most municipalities in the country, are at a very challenging position because they have old cast iron that is leaking everywhere. Th ey also have very poor fi re fl ow protection because of the corrosion inside the lines. So, they have been kind gearing up for the project for a number of years, came out and saw the technology and knew that is what they wanted. " Th e pre-chlorinated pipe bursting method has a history of more than 40 years and was developed by the United Kingdom water industry to address its failing cast iron water mains. Th e HDPE pipe is bacteriologically disinfected and pressure tested above grade prior to installation, which produces multiple construction effi ciencies. Th e crews will often also set up temporary services to keep homeowners and business connected to water service throughout construction. Murphy introduced the process to the North American market in 1999. Th ere are other advantages to using the pipe, according to the Plastics Pipe Institute Inc. (PPI), a major North American trade association representing the plastic pipe industry. " Th e use of HDPE in drinking water systems continues to grow and is specifi ed per the ANSI/AWWA C901-20, ANSI/AWWA C906UCONonline.com | OCTOBER 2021 19http://www.UCONonline.com