Template:Featured picture/April 2021

Summit Cutting or Power Station Summit (behind the pumped storage power station at Tanygrisiau, opened 1963) is the highest point of the continuous gradient from Boston Lodge, and therefore the highest point from which any gravity run could be made. Beyond this point the line drops at approximately 1 in 75 down to the original formation at Tanygrisiau. As the line leaves the north end of the cutting, it crosses a private (Electricity Board) road which is known as Valvehouse Crossing. At one time it was known as Penstocks Road Crossing. The photo shows the Penstocks viaduct under construction in May 1977.

Photo credit: User:MarkTemple

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