(Gresham, OR)  --  Crews are searching for four rafters who are missing on the Sandy River.  Authorities say the four men had started out from Oxbow Park yesterday afternoon, intending to meet two other men at Dabney State Park.  Officials say the four never showed up and the two friends contacted the Multnomah County Sheriff's Office.  KOIN-TV reports search-and-rescue personnel have been looking for the lost rafters throughout the night.