WestGas InterState, Inc.
Tariff Sheet/Section Index

SECTION SHEET EFFECTIVE DATE
Part I    
  Section 1 Preliminary Statement 09/08/2010
  Section 2 System Map 09/08/2010
  Section 3 Rates 10/01/2011
  Section 4 Rate Schedule FT - Firm Transportation Service 09/08/2010
  Section 5 Rate Schedule IT - Interruptible Transportation Service 09/08/2010
Part II General Terms and Conditions  
  Section 1 Definitions 09/08/2010
  Section 2 Requests for Transportation Service, Priority of Service, and Allocation of Capacity 09/08/2010
  Section 3 Shipper Nominations and Requests for Capacity 10/01/2010
  Section 4 Contract Demand Adjustment 09/08/2010
  Section 5 Measurement 09/08/2010
  Section 6 Quality of Gas 09/08/2010
  Section 7 Scheduling of Gas Receipts and Deliveries 09/08/2010
  Section 8 Balancing of Gas 09/08/2010
  Section 9 Priority of Service and Interruption 09/08/2010
  Section 10 Billing and Payment 09/08/2010
  Section 11 Force Majeure 09/08/2010
  Section 12 Responsibility for Gas 09/08/2010
  Section 13 Warranty 09/08/2010
  Section 14 Waivers 09/08/2010
  Section15 Request for Transportation Service 09/08/2010
  Section 16 Regulations 09/08/2010
  Section 17 Assignments 09/08/2010
  Section 18 Creditworthiness and Bankruptcy 09/08/2010
  Section 19 Shipper's Failure to Comply with Terms 09/08/2010
  Section 20 System Operation 09/08/2010
  Section 21 Annual Charge Adjustment Provision 09/08/2010
  Section 22 Compliance with Marketing Affiliate Rule 09/08/2010
  Section 23 Capacity Release Program 10/01/2010
  Section 24 Receipt Point Flexibility 09/08/2010
  Section 25 Delivery Point Flexibility 09/08/2010
  Section 26 Right-Of-First-Refusal 09/08/2010
  Section 27 Electronic Bulletin Board 09/08/2010
  Section 28 Miscellaneous 10/01/2010
Part III Form of Service Agreement  
  Section 1 Form of Service Agreement - Rate Schedule FT 09/08/2010
  Section 2 Form of Service Agreement - Rate Schedule IT 09/08/2010