Granite Construction Co. wants to terminate its contract to build a 7-mile-long stretch of Oregon highway that it says has been plagued by the presence of ancient landslides. Granite says site stabilization on the project to build U.S. 20 from Pioneer Mountain to Eddyville would cost $61 million above the $130-million design-build contract. State officials believe the cost to be much lower. The contract was awarded in July 2005 to Yaquina River Constructors, a joint venture of Granite and its majority-owned subsidiary, Wilder Construction Co.