Pipeline builder can waive U.S. rule
Canadian company to use thinner steel
By Terry Woster
http://www.argusleader.com/apps/pbcs.dll/article?AID=/20070908/NEWS/7090...
Published: September 8, 2007
PIERRE - A federal agency will allow TransCanada Keystone to design parts of its proposed crude oil pipeline for a stress level higher than current U.S. standards.