How to reach: TO REACH THE NOS GAUGING STATION, IN MARBLEHEAD, OTTAWA COUNTY, OHIO, FROM THE INTERSECTION OF ROUTE 163 (MAIN ST) AND FRANCES ST, PROCEED NORTH ON FRANCES ST FOR APPROX 0.1 MILE (0.2 KM) TO THE INTERSECTION WITH PRARIE RD, THEN PROCEED EAST ON PRARIE RD FOR APPROX 0.05 MILE (0.08KM) TO THE USCG GATE, THEN PROCEED THRU GATE AND TRAVEL NORTH FOR APPROX 0.1 MILE (0.2 KM) ON PAVED DRIVE TO NORTH END OF PROPERTY, ON THE PROPERTY OF THE U.S. COAST GUARD, NEAR THE BOAT HOIST RAMP AND CONCRETE CAPPED CELLS, TO THE NOS GAUGING STATION.