Insituform wins contracts
Insituform Technologies has been awarded two contracts with a combined value of $6.5 million from the Hallsdale-Powell Utility District in Knoxville, TN. These contracts mark the first time Insituform will work with Hallsdale-Powell, which will fund the projects with a state revolving fund loan secured through the American Recovery and Reinvestment Act (ARRA).
Insituform will rehabilitate approximately 25 miles of sewer pipelines with its cured-in-place pipe (CIPP) technology. The project is expected to be completed by June 2011.
Insituform will partner with Hallsdale-Powell Utility District as well as the engineering firm, Jordon Jones and Goulding, to inform the residents of the Knoxville area about the project and the benefits of the rehabilitation efforts.
Work on this project by Insituform’s crew based in Knoxville has already begun. A minority-owned business will provide the open-cut work and pipe bursting for a portion of the project. Additional contractors from Tennessee will provide the required manhole rehabilitation, lateral rehabilitation, pipe bursting and closed-circuit television inspection services as subcontractors to Insituform.
Insituform also has renewed its term contract with the city of Richmond, VA, and the city of London, Ontario, Canada.
Valued at up to $8.1 million, this is the third year of a five-year renewable contract and marks one of Insituform’s largest contracts to date from the city of Richmond.
Insituform first worked with Richmond in the mid-1980s. Under this contract, Insituform will rehabilitate small- and large-diameter wastewater pipelines with Insituform’s CIPP.
In addition to self-performing the CIPP installations, Insituform will utilize locally owned subcontractors to perform CCTV, manhole rehabilitation and other utility services.
The London, Ontario contract is valued at $6.2 million and is the largest trenchless sewer rehabilitation project in the city’s history. Nearly $2 million of the 2010 project is being funded through Canada’s Stimulus Funding Infrastructure Renewal Program. Including the successful completion of a $5.9 million term contract in 2009, Insituform has been awarded over $12 million in work with the city of London in the past two years.
Work on this project is expected to be completed by December 2010. Insituform CIPP will be used to rehabilitate nearly 25 miles of wastewater pipelines up to 48-inches in diameter.
City reports indicate the use of various trenchless technologies, including pipeline relining and repair, have resulted in cost savings of $81 million over the last five years. “The city currently uses trenchless technologies for sewer relining and watermain relining. The benefits are many — cost savings, because the road doesn’t need to be excavated; minimized disruption (one day as opposed to four months); and the environmental benefits of not requiring new materials,” said City of London, Division Manager — Construction Administration, Justin Lawrence.
CertainTeed Certa-Lok replaces aging clay sewer main in Illinois
The Village of Baldwin, IL, recently made the decision to replace a failing 40-year-old clay tile sewer main with a new 10-inch gravity sewer, featuring 600 feet of CertainTeed Certa-Lok C-900/RJ restrained-joint PVC pipe.
Since the new sewer main had to be installed in a high-traffic area, parallel to a main village street and under a state highway and a set of railroad tracks, Rhutasel and Associates Inc., of Freeburg, IL, the village’s consulting engineers, chose directional drilling as the method of installing pipe for the new sewer. In order to minimize disturbance to the public and keep costs down, directional drilling was the only realistic option. The engineers specified Certa-Lok C900/RJ pipe for its strong performance in directional drilling applications.
“We specified the Certa-Lok C-900/RJ restrained-joint PVC pipe mainly for its rigidity and ability to withstand stretching that may occur from the pulling force of the directional drilling rig,” says Travis J. Liefer, staff engineer for Rhutasel and Associates. “We needed a product that would be able to resist any minor deflections that may be in the actual bore itself. The Certa-Lok pipe met those needs.”
Certa-Lok C900/RJ is a performance-proven PVC product, ideal for both water and wastewater applications. Its innovative joining system, which utilizes a high-strength spline to connect pipe lengths, reliably holds the pipe together during installation and pressurization, while elastomeric O-rings provide a dependable pressure seal.
The Village of Baldwin hired contractor Korte-Luitjohan Contractors Inc., Highland, IL, to install the gravity sewer main and build a new sewage lift station. The contractor used a Vermeer directional drill and a DCI Digitrak F2 Drill-Head Locator with target steering crew to make a 600-foot bore. The bore began at a depth of 14 feet and ended at a depth of 17 feet, meeting grade requirements all the way. The installation took eight days, and the installed pipe was then camera-tested for sags and deflections and passed with flying colors.
“Certa-Lok provides outstanding leak resistance and holds up to the rigors of pipe pullback in directional drilling installations,” says Steve Gross, director of R&D and technical services for CertainTeed’s Pipe business. “The pipe is easily assembled, without the need for time-consuming and expensive joint fusion. And, most importantly, Certa-Lok requires a much thinner wall than HDPE pipe for an equivalent pressure rating, which significantly cuts material, drilling and operating costs.”
Thanks to the use of directional drilling, traffic suffered only minor, short-term disruption, and there was no disruption to the railroad, Illinois Highway 154 or businesses in the area. In addition, grading, seeding and roadway repairs were minimized by avoiding open trench installation.
“The rigidity of the Certa-Lok pipe eliminated the need for a casing under the railroad and highway areas,” says Kevin Korte, directional bore superintendent for Korte-Luitjohan Contractors. “We also found it easy to handle and install. It performed very well for us during the installation.”