Engineering Inc. - January/February 2008 - (Page 20) NewNavajo Nation Water For the A water supply and recovery system in Leupp, Ariz., provides members of the Navajo Nation with clean drinking water. Caption mULti-Project FeAtUre Project: Navajo Nation Water Supply, Leupp, Ariz. Firm: cDm industrial Services Group, Houston I 20 n an attempt to provide clean water to its community, The Leupp Chapter of the Navajo Nation in Arizona is building several water wells fueled by a natural underground aquifer. Houston-based El Paso Corp., a natural gas pipeline provider, recently joined the chapter’s efforts and donated a 240-gallon-per-minute water well to provide a year-round source of water for homes, farms, livestock and other uses. CDM Industrial Services Group was chosen to design and build the water recovery and supply system and fulfill the project’s goals of ensuring access to a self-contained, clean well-water recovery, storage and distribution facility. The project required the company to first drill a 12-inch-diameter well to a depth of 500 feet and to complete it with an 8-inchdiameter casing. “The 240 gallons per minute pumped by the well from the aquifer are discharged into a 25,000-gallon storage tank,” explains Dale Evans, CDM vice president. The system also includes a tablet chlorina- tor system with analyzer to treat the recovered water. It is designed to optimize operational flexibility using a discharge/fill pipe with a remote user interface to support fill valve operation for discharge into tank trucks and to preset fill volumes. CDM says logistical hurdles were a major impediment to the project. The Navajo Nation told the company that, in an effort to support its community, it was required to use subcontractors approved by the chapter. CDM agreed, but soon realized that its choice of subcontractors was severely limited by the project’s remote location. Few mechanical and electrical firms were equipped to work Dale Evans on the project. That’s when El Paso Corp. stepped in. The local company, which owns a nearby compressor station and uses Navajo Nation-approved subcontractors for its projects, helped CDM assemble the right team to get the job done. “By working with El Paso, and with careful planning and scheduling, we were able to ensure proper and efficient construction scheduling and workforce levels,” recalls CDM’s Evans. The result: a clean, reliable water supply for the people of the region. n eNGiNeeriNG iNc. jANUAry / FebrUAry 2008
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