Exhibit 2.1 AGREEMENT AND PLAN OF MERGER dated as of June 22, 2006Agreement and Plan of Merger • June 23rd, 2006 • Western Gas Resources Inc • Natural gas distribution • Delaware
Contract Type FiledJune 23rd, 2006 Company Industry Jurisdiction
Exhibit 2.1 AGREEMENT AND PLAN OF MERGER dated as of June 22, 2006Agreement and Plan of Merger • June 23rd, 2006 • Western Gas Resources Inc • Natural gas distribution • Delaware
Contract Type FiledJune 23rd, 2006 Company Industry Jurisdiction