Exhibit 99(c)(3) FIRST AMENDMENT TO AGREEMENT AND PLAN OF MERGER FIRST AMENDMENT dated as of December 14, 1999, to the Agreement and Plan of Merger, dated as of November 23, 1999 (the "Merger Agreement"), among Weyerhaeuser Company, a Washington...Agreement and Plan of Merger • December 15th, 1999 • Weyerhaeuser Co • Lumber & wood products (no furniture) • Delaware
