(1)  Area  (2)  Plot Reference  Number(s) shown on  land plans  (3)  Height above  Ordnance Datum (m)  (4)  Purpose(s) for which  airspace and new  rights may be  acquired  covenants) below, for  the protection and  maintenance of the  new bridge.  3-34  13.480 metres  Airspace for the  construction and  operation of the new  bridge and new rights  (including restrictive  covenants) below, for  the protection and  maintenance of the  new bridge.  3-35, 3-37, 3-38  8.065 metres  Airspace for the  construction and  operation of the new  bridge and new rights  (including restrictive  covenants) below, for  the protection and  maintenance of the  new bridge.  88