Pembroke Dock Industrial Admiralty WW2

                           This  is spreading daily built above the following structures?

                                          The Dockyard Reservoir

                                          twenty five foot high ten foot thick blast wall
                                          two hundred yards long with rail line behind

                                                   All structures recently cleared paths through the woods

                                                    Steel reinforced building

                                                    Interior

                                         Tunnel entrance with rail bed from the Dockyard