Symbols representingthese valves provide awealth of information about the valve it represents. Symbols show the meth-ods of actuation, the number of positions, the flow paths and the number of ports. Hereisabriefbreakdown of how to read asymbol: Every symbol has three parts (see figuretoright).
Description. Safe Harbor Dam is a dam located just 5.7 miles from Millersville, in Lancaster County, in the state of Pennsylvania, United States, near Lockport, PA.escription. Safe Harbor Dam is a dam located just 5.7 miles from Millersville, in Lancaster County, in the state of Pennsylvania, United States, near Lockport, PA.
Take State Route 60 East (Gulf to Bay Blvd.) to the Bayside Bridge (which provides the most direct route from Safety Harbor as well as via McMullen Booth Road). Take the first exit just south of the bridge and turn left to head east on SR 686 (Roosevelt Blvd.). The airport will be on the left.