NNG - Tariff - Fifth Revised Sheet No. 299

Northern Natural Gas Company                                              Fifth Revised Sheet No. 299
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                               Fourth Revised Sheet No. 299




                                    GENERAL TERMS AND CONDITIONS


                    4)  Best Offer
                        ----------

                        Northern will determine which bid constitutes the best offer by determining
                        the highest economic unit value (per dekatherm of capacity) to Northern.  A
                        calculation based on rate, term and quantity will be used to determine the
                        highest economic unit value, utilizing the FERC interest rate.  The
                        comparative economic unit value of each bid will be determined by
                        calculating the Net Present Value (NPV) of the incremental revenues of each
                        offer over either the term of the offer or five (5) years, whichever is
                        less, and then dividing by the quantity of the respective bid.  However, if
                        the bid is at maximum rate and the term is more than five (5) years, the
                        entire term will be considered in determining the economic unit value.  The
                        best bid will be the bid with the highest net present value (NPV).  The NPV
                        is the discounted cash flow of incremental revenues per dekatherm to
                        Northern for service.  Incremental revenues are those revenues above and
                        beyond the current revenues which Northern already receives from
                        reservation charges being paid prior to the bid period.  Northern will
                        utilize the NPV calculation based on rate, term and quantity to determine
                        the highest incremental revenues per dekatherm.  The NPV calculation shall
                        include only revenues generated by the reservation rate or a guaranteed
                        throughput volume.  In those cases where one or more bidders is willing to
                        pay the maximum recourse reservation rate, the NPV used in such cases is
                        capped at, and may not exceed, the NPV equal to the maximum reservation
                        rate available to recourse shippers.

                        For purposes of determining the best bid and allocating capacity, shippers
                        willing to pay more than the maximum tariff rate will be considered to be
                        paying the maximum tariff rate.

                        In the event equivalent offers are submitted, the capacity will be made
                        available on a pro rata basis to the equal bidders.  Should any one of the
                        equal bidders veto their pro rata allocation of the capacity, Northern will
                        then conduct a lottery to select the winning bidder, who will then, if the
                        bid is not matched under Section 5) below, be allotted its requested
                        capacity.  The remainder of said capacity, if any,  will be available to
                        the other equal bidder(s) on a pro rata basis, which will again trigger the
                        veto/lottery selection process.

                        In the event that Northern is conducting an open season for generally
                        available FDD capacity at the same time as the FDD Right of First Refusal
                        process, Northern will allocate bids at maximum rates first to generally
                        available FDD capacity and then on a pro rata basis to FDD Right of First
                        Refusal capacity.  Northern will include in the posting the allocation
                        parameters for bids at less than maximum rates.  In no event will Northern
                        be required to enter into an Agreement at less than maximum rates.

                        Northern will post the name of the winning bidder on the website for a
                        period of no less than five (5) work days.  The winning bidder must execute
                        a Service Agreement within fifteen (15) days of Northern's tender thereof.





Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: January 25, 2006                                             Effective: February 25, 2006