Northern Border Pipeline Company
FERC Gas Tariff
First Revised Volume No. 1

Substitute Third Revised Sheet No. 177
Superseding
Second Revised Sheet No. 177

                              RATE SCHEDULE T-1B
                             FIRM BACKHAUL SERVICE

  1.  AVAILABILITY

       1.1   Availability of Service

             This Rate Schedule is available to any Person (hereinafter 
             called Shipper) desiring the transportation of natural gas 
             on a firm Backhaul basis after the satisfaction of the 
             credit worthiness provisions under Section 41 of the 
             General Terms and Conditions and the execution of a T-1B 
             Service Agreement with Company under this Rate Schedule.

       1.2   Limitation on Availability of Service

              1.21  Existing Facilities

                    Company shall not be required to provide service 
                    under this Rate Schedule that would require Company 
                    to construct or acquire any new facilities.

              1.22  Prerequisite to Forwardhaul Service

                    Forwardhaul transportation service in which the 
                    nominated Point of Receipt milepost on Company's 
                    system is less than the corresponding nominated Point 
                    of Delivery milepost, shall be permitted under Rate 
                    Schedule T-1B on a secondary basis to the extent 
                    Company has capacity available.  

              1.23  Prerequisite to Backhaul Service

                    Backhaul transportation service under Rate 
                    Schedule T-1B shall only be available to the extent 
                    that firm service Forwardhaul volumes are received 
                    into Company's system on the same Gas Day upstream 
                    of or at the nominated Point of Delivery and are 
                    required to be delivered out of Company's system 
                    downstream of or at the designated Point of Receipt 
                    such that the firm Backhaul service can be provided.  
                    Backhaul transportation service under Rate Schedule 
                    T-1B shall only be available to the extent that the 
                    volumes transported do not exceed the physical 
                    capacity at such Points of Receipt and Delivery. 

                    The use of a physical Point of Receipt as a nominated 
                    Point of Delivery and a physical Point of Delivery

Issued by: Raymond D. Neppl, Vice President
Issued on: June 2, 2003                       Effective on: September 1, 2003
Filed to comply with order of the Federal Energy Regulatory Commission, Docket 
No. RP00-403-000, et al., issued May 6, 2003, 03 FERC ¶ 61,134