Northern Natural Gas Company                                              Third Revised Sheet No. 452
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                               Second Revised Sheet No. 452

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                             SYSTEM MANAGEMENT SERVICE AGREEMENT

              This System Management Service Agreement ("Agreement") by and between

              Northern Natural Gas Company ("Northern") and _______________

              ____________________________________ ("Shipper"), covering daily

              variances between volumes scheduled at delivery points and volumes actually

              taken at the delivery points under the Throughput Service Agreement listed on Appendix "A,"

              which is attached hereto and incorporated by reference ("Corresponding Throughput Service

              Agreement"), is entered into in accordance with the following terms and conditions:

                       CONTRACT NO.:___________

                       SMS CONTRACT QUANTITY (SMSQ): _______  DTH/day


                       TERM:  This Agreement shall become effective on _____________________

                       and shall have a term ending on______________________.


                       RATE: Shipper shall pay Northern each month for System Management Service rendered

                       hereunder at the maximum rates or charges in effect from time to

                       time under Rate Schedule SMS, or any effective superseding Rate

                       Schedule on file with the Commission.





















Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: January 21, 2009                                             Effective: February 21, 2009