NNG - Tariff - 80 Revised Sheet No. 51

Northern Natural Gas Company                                                  80 Revised Sheet No. 51
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                                    79 Revised Sheet No. 51




                       R A T E   S C H E D U L E S   T F X   a n d   L F T



                                  MARKET-TO-MARKET              FIELD-TO-FIELD
                                  -----------------           --------------------
        RESERVATION RATES         Apr-Oct  Nov-Mar             Apr-Oct    Nov-Mar
--------------------------------- -------- --------           ---------  ---------
Base Tariff Rates 1/               $5.683  $15.153              $5.473     $9.853
                                  ======== ========           =========  =========



------------------------------------------------------------------------------------------------------------
       COMMODITY RATES  2/                           Field Mileage 5/    Carlton
         TFX and LFT              Market Area  3/   Rate per 100 miles   Surcharge 4/      Out-of-Balance 3/
--------------------------------- ----------------- -------------------  ----------------  ----------------
Receipt Point   Delivery Point    Maximum  Minimum   Maximum   Minimum   Maximum Minimum   Maximum Minimum
-------------   --------------    -------- -------- --------- ---------  ------- --------  ------- --------
Market          Market            0.0384   0.0215                        0.0175  0.0000    0.0384  0.0215
Field           Market            0.0384   0.0215    0.0122    0.0040    0.0175  0.0000
Market          Field                                0.0122    0.0040
Field           Field                                0.0122    0.0040                      0.0295  0.0109
------------------------------------------------------------------------------------------------------------
                                  Reservation 1/       Commodity  6/     Out-of-Balance 6/
                                  ----------------- -------------------  ----------------
         GULF COAST               Maximum  Minimum   Maximum   Minimum   Maximum Minimum
--------------------------------- -------- -------- --------- ---------  ------- --------
MOPS Gathering                     1.0514   0.0000    0.0019    0.0019    0.0019  0.0019
MOPS Transmission                  1.5337   0.0000    0.0019    0.0019    0.0019  0.0019
Tivoli - Downstream                0.6827   0.0000    0.0019    0.0019    0.0019  0.0019
Other Gulf Coast                   4.8169   0.0000    0.0019    0.0019    0.0019  0.0019


1/  The minimum reservation rate is equal to zero.
2/  The applicable Mileage Indicator Districts (MIDs) billing rate will be added to the TF rates for volumes
    received in the Field Area, or received in the Market Area and delivered to the Field Area.  The MIDs
    rates shown on Sheet Nos. 59-60A represent the total maximum Field Area throughput commodity rates for
    any transaction involving MIDs.
3/  Maximum and Minimum rates include ACA of $0.0019 and the Market Area Electric Compression charge of
    $0.0006 where applicable.
4/  Applicable to Market Area shippers as provided for in the Carlton Settlement filed in Docket
    No. RP96-347 dated October 28, 1996.
5/  Where applicable, Field Area Compression charge of $0.0000 and ACA will be added to the mileage based
    rates.
6/  Maximum and Minimum rates include ACA of $0.0019.












Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: February 1, 2010                                                 Effective: April 1, 2010