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Reference.org
Pony Express Pipeline
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<p>The Pony Express Pipeline (PXP) is a 760-mile (1,220 km) pipeline connecting <a href="/facts/Guernsey,_Wyoming/kKcw5fxx">Guernsey, Wyoming</a> with the oil hub of <a href="/facts/Cushing,_Oklahoma/QH5qnHIH">Cushing, Oklahoma</a>. </p>