Northern Natural Gas Company                                          Fourth Revised Sheet No. 66B.15
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                             Third Revised Sheet No. 66B.15




                                      SHEET NO. 66.15 IS RESERVED
                                            FOR FUTURE USE
 























































Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: May 29, 2009                                                      Effective: June 1, 2009