EXHIBIT 1.1 Western Gas Resources, Inc. 10% Senior Subordinated Notes due 2009 guarancteed as to the payment of principal, premium, if any, and interest byMountain Gas Resources Inc/De • September 10th, 1999 • Natural gas transmission
Company FiledSeptember 10th, 1999 Industry
CHASE BANK OF TEXAS, NATIONAL ASSOCIATION, As Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of September , 1999Mountain Gas Resources Inc/De • September 10th, 1999 • Natural gas transmission • New York
Company FiledSeptember 10th, 1999 Industry Jurisdiction
EXHIBIT 4.4 Western Gas Resources, Inc. 10% Senior Subordinated Notes due 2009 unconditionally guaranteed as to the payment of principal, premium, if any, and interest byMountain Gas Resources Inc/De • September 10th, 1999 • Natural gas transmission • New York
Company FiledSeptember 10th, 1999 Industry Jurisdiction
RECITALSExchange Agreement • September 10th, 1999 • Mountain Gas Resources Inc/De • Natural gas transmission • Texas
Contract Type FiledSeptember 10th, 1999 Company Industry Jurisdiction