A plan for a proposed underground pipeline route through Arizona's deserts is calling for the use of boulders to keep out smugglers and immigrants trying to enter the country without legal permission.
The Arizona Daily Star reports that measures are part of Kinder Morgan Energy Partners' access-control strategy. The measures are outlined in a document Kinder Morgan filed with the federal officials earlier this month.
The company is seeking to build a 59-mile Sierrita natural gas pipeline through the Altar Valley southwest of Tucson to Sasabe.
Their plan also calls for fences, timber debris, signs and pipe barriers along the route.
A top Kinder Morgan official says these strategies have worked for gas pipeline projects in Oregon, Utah and Wyoming.
Altar Valley ranchers who oppose the pipeline say they're still dubious the control measures.
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