Northern Natural Gas Company                                              Fifth Revised Sheet No. 80B
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                               Fourth Revised Sheet No. 80B

                                  NON-CONFORMING SERVICE AGREEMENTS

                                                     Agreement/
                                          Rate       Amendment        Date
    Name of Shipper/Agreement No.       Schedule       Date           Filed
    -----------------------------       --------     ---------        --------


Southwestern Public Service Co.           TFX        06/01/08         03/07/08
    Contract 116267

BP Canada Energy Marketing Corp.          PDD        12/01/09         01/15/09
    Contract 110621/801571


Northern States Power Company-Wisconsin    TF        11/01/09         06/09/09
    Contract 23269/Amd 100

SEMCO Energy Gas Company                   TF        11/01/09         09/23/09
    Contract 110025/Amd 28

Chevron U.S.A. Inc.                       PDD        10/01/10         03/31/10
    Contract 110598/801937

Madison Gas and Electric Company           TF        09/01/05         06/11/10
    Contract 21340/Amd 32


































Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: June 11, 2010                                                    Effective: July 12, 2010