Northern Natural Gas Company                                              Fifth Revised Sheet No. 140
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                               Fourth Revised Sheet No. 140




                             RATE SCHEDULE FDD
                       Firm Deferred Delivery Service

  6.  RATES AND CHARGES
      -----------------

      The rates and charges for service under this Rate Schedule shall include each
      of the following:

      (a)  Reservation Charge - The reservation charge is set forth on Sheet No. 55
           of this Tariff.  The reservation charge is billed monthly for 12 months.
           The monthly bill is equal to the reservation charge multiplied by the
           Shipper's highest FDQ during the Withdrawal Period.

      (b)  Capacity Charge - The capacity charge is set forth on Sheet No.  55 of
           this Tariff.  The capacity charge is billed each month during the
           Injection Period.  The monthly bill is equal to the capacity charge
           multiplied by the FSQ divided by 5. The capacity charge is billed each
           month of the Injection Period.

      (c)  Injection Charge - The injection charge per Dth is set forth on Sheet No.
           55 of this Tariff.  Such charge shall apply to all quantities received by
           Northern for Shipper's FDD account during the Injection Period, and is
           billed each month during the Injection Period.  The injection charge in
           the Withdrawal Period shall equal the authorized overrun charge.

      (d)  Withdrawal Charge - The withdrawal charge per Dth is set forth on Sheet
           No. 55 of this Tariff.  Such charge shall apply to all quantities
           withdrawn from Shipper's FDD account during the Withdrawal Period, and is
           billed each month during the Withdrawal Period.  The withdrawal charge in
           the Injection Period shall equal the authorized overrun charge.

      (e)  Fuel - The FDD storage fuel rate is set forth on Sheet No. 54 of this
           Tariff.  Such rate shall apply to all quantities received by Northern for
           Shipper's FDD account during the Injection Period.

      (f)  Rollover Charge - The rollover charge per Dth is set forth on Sheet No.
           55 of this Tariff.  Such charge shall apply to the balance held in
           Shipper's FDD account as of the end of the Withdrawal Period.

      (g)  Authorized Overrun Charge - The authorized overrun charge is equal to the
           IDD Monthly Inventory Charge as set forth on Sheet No. 55 of this Tariff.
           The authorized overrun charge shall be assessed to quantities scheduled
           above the Shipper's FDQ and to quantities less than or greater than the
           periodic account balance parameters in Shipper's Service Agreement, as
           provided in Section 3. of this Rate Schedule.

      (h)  Flexibility - Unless otherwise mutually agreed to by Northern and Shipper,
           all rates for service herein shall be flexible within the minimum and
           maximum levels shown on Sheet No. 55 of this Tariff.  The rate(s) Shipper
           shall pay will be set forth in Shipper's Service Agreement, or otherwise
           agreed to in writing.  Northern shall have the right to charge the maximum
           rate at any time as a condition of new service or continuation of service
           beyond the termination date set forth in Shipper's Service Agreement.
           Northern shall make all filings required by F.E.R.C. regulation with
           respect to the rate(s).


Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: June 30, 2006                                                   Effective: August 1, 2006