Paged by RCMP at 10:25 to assist with a search for an overdue ATV rider on Harrison W FSR. Command established in Harrison at 11:15. UTV's and trucks searching logging roads in upper Chehalis and on Harrison W FSR, north of 20 Mile Bay. Suspended with ECC at 22:30. Task recommenced at 0730 on 2014/09/03. Command established at 20 Mile Bay at 09:45. Valley helicopter on scene at 10:00. Pemberton SAR helicopter at Sloquet Creek at 10:45. Subject located near mouth of Upper Chehalis River (at outflow into lake) by co-workers (CV) at 11:07 as SAR were en-route to that location.