Outside the little town of Plains, Texas last week, bulldozers, trenching machines and jeeps were busy working on El Paso Natural Gas Co.'s $180 million pipeline across New Mexico and into Arizona. Along with the usual crews of laborers were two men equipped with some unusual tools—archaeologists' spades, trowels, notebooks, cameras, maps and paper bags. They were part of a larger team of archaeologists who will walk some 1,000 miles of the pipeline's right of way (including spurs in Colorado and Utah), scanning the surface for telltale signs of ancient Indian ruins...
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