0001126975-06-000004 4 1 20060118 20060120 20060120 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 MEARS MICHAEL N 0001188019 4 34 001-16335 06540551 PO BOX 3448 TULSA OK 74101 9185747400 ONE WILLIAMS CENTER, MD 28-1 TULSA OK 74172 4 1 edgar.xml PRIMARY DOCUMENT