Northern Natural Gas Company                                          Second Revised Sheet No. 66B.16
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                             First Revised Sheet No. 66B.16








                              SHEET NO. 66B.16 IS RESERVED FOR FUTURE USE
 




















































Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: March 17, 2010                                                  Effective: April 17, 2010