0001126975-08-000011 4/A 1 20080124 20080128 20080128 MAGELLAN MIDSTREAM PARTNERS LP 0001126975 4610 731599053 DE 1231 ONE WILLIAMS CENTER, MD 28-1 TULSA OK 74172 918 574 7000 ONE WILLIAMS CENTER, MD 28-1 TULSA OK 74172 WILLIAMS ENERGY PARTNERS L P 20001024 WELLENDORF DON R 0001187049 4/A 34 001-16335 08552727 9185747001 ONE WILLIAMS CENTER, MD 28-1 TULSA OK 74172 4/A 1 edgar.xml PRIMARY DOCUMENT