Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 02/21/2009, Docket: RP01-223-004, Status: Effective

Sixth Revised Sheet No. 1 Sixth Revised Sheet No. 1 : Pending

Superseding: Substitute Fifth Revised Sheet No. 1

T A B L E O F C O N T E N T S

FIFTH REVISED VOLUME NO. 1 SHEET NOS.

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Preliminary Statement 20

System Maps 25

Currently Effective Rates

TF 50, 53, 54

TFX and LFT 51, 53, 54

TI 52, 53, 54

GS-T 53

SMS 55

FDD 55

IDD 55

VFT 56

Rate Schedule

TF Firm Throughput 100

TFX Firm Throughput 116

LFT Limited Firm Transportation 125A

GS-T General Service - Throughput 126

TI Interruptible Throughput 128

FDD Firm Deferred Delivery 134

IDD Interruptible Deferred Delivery 143

SMS System Management Service 148

SF Supply 150

MPS MID Pooling Service 153

IMA Imbalance Master Agreement 156

VFT Volumetric Firm Throughput 158