NNG - Tariff - Eighth Revised Sheet No. 264

Northern Natural Gas Company                                             Eighth Revised Sheet No. 264
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                              Seventh Revised Sheet No. 264

              (d)  Other Flow Orders.  Northern and Shipper may agree to a contract specific
                   receipt or delivery point flow requirement which could require receipts from
                   or deliveries to the primary points under a Shipper's firm agreement in
                   order to alleviate conditions on Northern's system that threaten the safe
                   operations or system integrity or to maintain conditions on Northern's
                   system that are required to maintain safe operations or system integrity.
                   Northern and Shipper may agree to discount the transportation rate, provide
                   a contribution in aid of construction, or other consideration consistent
                   with the terms of Northern's FERC-approved tariff as the consideration for a
                   contract specific flow order.  Northern will post on its Internet website,
                   under Transactional Reporting, applicable provisions and consideration
                   provided under this provision.

              (e)  OBA GENERAL TERMS & CONDITIONS

                   If requested by a Shipper, Northern agrees that it will negotiate an
                   Operational Balancing Agreement (OBA) with an entity that operates the
                   facilities interconnecting  with Northern or controls supplies entering
                   Northern's system at interconnection point and/or receipt point(s)
                   ("Operator"), as applicable.  An OBA is a contract between two parties which
                   specifies the procedures to manage operating variances at an interconnect.
                   Such an OBA with Operator will be subject to the following conditions.

                   GENERAL TERMS AND CONDITIONS

                   1.   Quantities nominated by Shipper are  confirmed on a reliable basis by
                        Operator;

                   2.   Data Acquisition Systems or other monitoring equipment generally
                        acceptable by industry standards exists at the interconnection point
                        and/or receipt point(s);

                   3.   Operator must meet the same credit worthiness standards as Shipper(s)
                        for whom it is operating on behalf of;

                   4.   Operator must possess sufficient quantities of gas for it to balance
                        receipts and/or deliveries under the OBA.

              An Operational Balancing Agreement may be subject to certain conditions as
              follows:

                   1.   Any receipt point imbalance and scheduling penalties otherwise
                        applicable to Shipper will be applicable to operator unless Northern
                        maintains flow control equipment at the wellhead receipt or
                        interconnection point(s) under the Operational Balancing Agreement.

                   2.   Operator and Northern will negotiate in good faith to agree on a method
                        of valuing imbalances based on market price indices.  The method of
                        valuing imbalances will be applied in a non-discriminatory manner.
                        Nothing in this section is intended to restrict Northern's ability to
                        either execute an Operational Balancing Agreement without market based
                        imbalance evaluation or to terminate such an agreement for lack
                        thereof.  However, OBAs applicable to non-contiguous facilities shall
                        be resolved by cash in/out.

             30.  BILLING THROUGHPUT QUANTITY
                  ---------------------------

               A. Single Shipper. The Billing Throughput Quantity ("BTQ") shall be the volumes
                   actually delivered for a Shipper.  For monthly billing purposes, the
                   determination of the BTQ for a Shipper transporting gas under more than one
                   Throughput Rate Schedule shall be in the following order (Default Order)
                   unless agreed to otherwise by Northern and the Shipper prior to the
                   close of business of such production month:

                    (1) volumes, including overrun volumes, scheduled for delivery under Rate
                        Schedule(s) TFX and LFT, if any;

                    (2) volumes, including overrun volumes, scheduled for delivery under Rate
                        Schedule(s) TI and GS-T, if any;
Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: March 17, 2010                                                  Effective: April 17, 2010