In March 2006, a landslide occurred along the segment of Ygnacio Valley Road between Cowell Road and the City of Concord’s jurisdictional limit with the City of Walnut Creek. One eastbound lane was closed. In June 2006, Concord received emergency relief funding for the temporary repair that constructed an auxiliary lane, thus restoring two eastbound lanes. In mid-December 2007, the Federal Highway Administration (FHWA) approved emergency relief funding in the amount of $2.7 million to construct a pier wall with tieback system (protective feature) and repair the damaged roadway (Phase 1). Phase 1 was completed in Fall 2008. Phase 2 lengthens the pier wall and repairs the portion of Ohlone trail damaged in the 2006 landslide.