Northern Natural Gas Company                                             Second Revised Sheet No. 457
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                                First Revised Sheet No. 457

(Placement on page, number of pages, format, capitalization and font may vary)


                                                Contract No.: _____________
                                                Request No.: ______________
                                                Amendment No.: ____________[if applicable]



 Appendix A

 System Management Service Agreement



 Shipper: _________________________________________

 Term:__________through__________

 Corresponding Throughput Service Agreement No.:_______________________________


 SMS Contract Quantity:____________________Dth/day


     POI #                   Delivery Point          Daily SMS Contract Quantity (Dth)
     -----                   --------------          ---------------------------












                              Total        _____________________________





















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