A 76-year-old Appleton man died in a one-vehicle accident early Friday morning on Highway 14.  According to the Washington State Patrol, the pickup driven by Roger Macy was westbound on Highway 14 at milepost 74 when it went onto the westbound shoulder and struck the guardrail.  The truck then overcorrected, crossed both lanes of the highway, went onto the eastbound shoulder, struck the guardrail and went over it, coming to rest on its top in Chamberlain Lake.  The WSP says Macy was deceased at the scene.  The accident occurred at about 3 a.m. Friday.