0001181431-08-025800 8-K 2 20080415 5.03 9.01 20080421 20080421 MAGELLAN MIDSTREAM PARTNERS LP 0001126975 4610 731599053 DE 1231 8-K 34 001-16335 08765855 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 8-K 1 rrd202953.htm AMENDMENT TO LIMITED PARTNERSHIP AGREEMENT EX-3.1 2 rrd202953_23983.htm AMENDMENT NO. 4 DATED APRIL 15, 2008 AND EFFECTIVE AS OF JANUARY 1, 2007 TO FOURTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF THE PARTNERSHIP DATED AS OF APRIL 13, 2005.