X0101 EFFECT 33 LIVE 2012-06-01 0001193125-12-251492 POS AM 0001066107 EL PASO CORP/DE 333-158205 0000200155 COLORADO INTERSTATE GAS COMPANY, L.L.C. 333-158205-06 0001459406 COLORADO INTERSTATE ISSUING Corp 333-158205-05 0000031986 EL PASO NATURAL GAS CO 333-158205-04 0000092232 SOUTHERN NATURAL GAS COMPANY, L.L.C. 333-158205-03 0001416196 Southern Natural Issuing CORP 333-158205-02 0000097142 TENNESSEE GAS PIPELINE COMPANY, L.L.C. 333-158205-01