Have you not considered, iRaven, that the henge might simply have been pressed into service as the base for a cooling tower, either to disguise it or because the East Germans thought 'Ach, ve do not know vat ziss iss, but - if Archimedes will stop the comedy attempt at writing out our accents- we will make use of this remarkably convenient structure which is just the right size and in just the right place'?
And might I respectfully suggest that if you haven't considered that possibility, you haven't drunk enough?