b_fifteenmile_ckFifteen Mile Creek Bridge on I-84 near The Dalles is now open to traffic again.  GRI worked withDavid Evans and Associates, Inc. to replace the aging bridge as part of ODOT’s Oregon Transportation Investment Act (OTIA).  The new bridge crosses a relatively deep canyon of Fifteen Mile Creek, about 75 ft above the canyon floor. The sidewalls of the canyon consist of nearly vertical outcrops of flow basalt. The bridge is supported on spread footings, most on hard basalt. The interior bent footings are tied down with rock anchors.