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Using Aqua-Pipe technologies to renew water mains, Omaha, Neb. AMONG OUR WATER PROJECTS
STATE Nebraska PROJECT Omaha Municipal Utility District OWNER/CLIENT Omaha Municipal Utility District DETAILS Use Aqua-Pipe technologies to improve water mains of 5,600 linear feet, involving pipe 6 inches to 8 inches in diameter. Mains were located under concrete streets, driveways and sidewalks in a heavily populated residential area. Project required reinstating 145 service connections internally using a robotic device. CHALLENGES AND SOLUTIONS In 2011, SAK completed Omaha’s largest structural lining project to date. The project required rehabilitating over a mile of aging, cement-lined cast iron water mains that had experienced dozens of breaks over the years. Challenges included providing temporary bypass service to 145 individual residences and 11 temporary fire hydrants. The project consisted of four separate streets in the neighborhood. To allow homes on different streets to share the same bypass piping, SAK installed it along common property lines in back yards, instead of in the front, as is typically done, thus saving time, materials and expense. As with all Aqua-Pipe projects, the service connections must be temporarily plugged from within the water main. This is done to prevent resins from migrating into the corporation stop valve. SAK’s robotics experts were able to use the Omaha MUD project as an opportunity to modify and streamline the process to dramatically reduce the construction time. SAK took a streamlined approach to plugging the existing service connections, which had to be blocked during installation of the new liner, and then reinstating those connections internally using a robotic device. On a project with 145 connections spread out over 5,600 linear feet, SAK’s innovative techniques saved significant time, allowing for a lower-impact project and minimizing disruption to the above-ground environment. Following the project’s successful completion, Omaha MUD selected SAK for an additional project—the repair of water mains located under railroad tracks on the other side of the city.
Texas PROJECT Rehabilitation of water transmission main OWNER/CLIENT City of Amarillo DETAILS Use trenchless technology to install HDPE liner in 2,100 linear feet of existing 30-inch water transmission main CHALLENGES AND SOLUTIONS In a joint venture with Murphy Pipeline Contractors, SAK renewed a 30" cast-iron water transmission main dating to 1927. The main, part of the city’s original municipal water system, was leaking due to bad lead joints. To minimize surface disruption of the high-traffic residential areas above the pipeline, SAK/Murphy took a trenchless approach using the Swagelining™ system, which allows a new, tight-fitting high density polyethylene (HDPE) pipe to be placed inside existing pipelines. Beginning with 50 foot sticks of HDPE pipe 32 inches in diameter, SAK/Murphy crews fused the pipe into continuous runs equivalent to the length of transmission main to be renewed in each pull. They then used a hydraulic static ram to pull the continuous length of HDPE pipe through a reduction die to temporarily compress the diameter to approximately 29.5 inches. While maintaining tension on the liner, the crews pulled it through the existing 30-inch metal water transmission pipe. Once the liner was properly placed, the tension on it was released, allowing it to revert to fit tightly within the original pipe thus eliminating leakage and providing the residents with a reliable and protected water transmission main.
Use Aqua-Pipe technologies to rehab dam pipe, San Diego County, California
STATE California Project Rainbow Municipal Water District Owner/client Rainbow Municipal Water District location San Diego County details A "one-day build" project using the Aqua-Pipe structural rehabilitation technologies to rebuild 155 linear feet of difficult-to-access dam pipe, 6 inches in diameter. Challenges and solutions Improvements were required on a 30-year-old dam outfall vent pipe in a concrete and asphaltic lined reservoir that provides drinking water to a community near San Diego. This main is located under a 45-degree concrete slope, making equipment access, as well as proper installation of a cured-in-place pipe liner, particularly challenging. Because the reservoir held drinking water, an NSF-approved solution was required. Since future maintenance was not expected for decades, a proven, fully structural Class IV lining solution was selected and new valve works were installed. SAK successfully completed the project in one day by utilizing trenchless technology and capitalizing on Aqua-Pipe's patented epoxy resin designed to bond to the host pipe. Most importantly, since specialty internal fittings and internal mechanical seals are not required with Aqua-Pipe, the finished product left no obstructions within the sensitive pipe segment. _______________________________________________________________________________
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