This close up from the Graphic shows the 20 inch rail way and trucks. From the information we have the items shown here are the observation buoys awaiting loading the actual mines are not shown. The boxes in foreground are most probably detonator boxes posed for the shot as they would have been used on a one by one basis in the Mines Closure building. Seen close to the service vessel funnel is the jib ( white) of the loading crane on the wharf, this still exists in this position.