The two keystones are in place and the lowest pair of voussoirs are fitted.
The other large sandstone voussoirs we shaped are then lifted on by hand, one by one, and fitted carefully along the outer sides of the form so there were no gaps.
As we built up the outsides, the centre of the arch was infilled with micca quartzite builder stones from Sidney Peak Quarry. They were laid face down in an array of radiating courses spaced properly near the upper edges with the ever important, yet tiny, shim stones.
Watching out for fingers!
Removing the stones from the temporary form was not as difficult as you might imagine.
The concrete outer shell broke out nicely too.
Finished Arch - Strong bones that stand ready for 'fleshing out' into a bridge when the time comes.
Thanks to Sean Smyth, Sean Adcock, Alan Ash and Patrick McAfee for all their help on this project.