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.
Fortunately, the shoreline below the Safe Harbor Dam where the eagles are congregating is open to the public, readily accessible and will give you a ringside seat to the eagle extravaganza. The parking area below the dam on Powerhouse Road, just off of River Road near Conestoga, lines the riverbank.hanks to ice that has covered much of the Susquehanna River, overwintering eagles have flocked to the clear water below the dam, fighting over fish and hanging out in trees. âThis is definitely not a usual occurrence,â observes Epler, who was birding in the county that day and just stopped by the dam on a whim.