Re: Centering table in an existing pit

Rex Beistle Wrote:
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> The turntable was built in Pennsylvania, perhaps
> in POTTSVILLE, PA.
> There is (was) a makers mark in the center panel
> of one (or both) sides.
> At one time part of the circular makers mark could
> be seen as ??TTSVILLE PA, but the rest of the
> marking was rusted away.
>
> Although principally a coal mining town,
> POTTSVILLE did have an ironworks.

I think this stamping of Pottsville is from the manufacturer of the rolled plate iron, (wrought iron). The girders mechanical design strongly suggest this bridge was built by the Edge Moore Iron Works of Willmington, Deleware. I will expain this someday when I can get my external hard drive online. If one looks at UP Magazine on Google Books there is a article on the history of UP turntables and they preceded Edge Moore turntables in the early 1880s.