An accident just north of Trimble in Clinton County sent two women to the hospital on Saturday night.  The Highway Patrol reports Melanie Ewing, 40, of Plattsburg was southbound on Highway 169 when she crossed the center line and struck another car driven by Heather Mason, 33, of Trimble.  Investigators said both cars left the roadway and traveled into the ditch.  Ewing’s vehicle overturned. Mason received minor injuries while Ewing was moderately hurt. Both women were taken to Heartland Regional Medical Center.