An accident Friday morning in Clay County sent an Excelsior Springs resident to an area hospital.  The crash occurred shortly before 8:30 a.m. on I-35 at Pleasant Valley Road.  According to the Highway Patrol, Paula Evans, 59, rear-ended Steven Hamilton, 60, of Kansas City, as both were headed south on the interstate.  Evans went off the road and hit a guardrail.  She was taken to North Kansas City Hospital with minor injuries.  Hamilton was not hurt.