We have continued to work on Pit 20 and the beam which it contains, this appearing to be the central part of the mechanism which at one time stood on the site. The large beam has a complicated profile on its upper surface and we have a problem as to how best to record the intricacies of its form, which defy our artistic talent. Mike Tizzard has hit upon the idea of using expanding polyurethane builder’s foam which when set is impervious to the water which floods the pit continually: the photo to the left shows the result from one section of the beam.
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