EXHIBIT 2.1 STOCK PURCHASE AGREEMENT THIS STOCK PURCHASE AGREEMENT (this "Agreement") is made this 3rd day of November, 2000, by and among PITT-DES MOINES, INC., a Pennsylvania corporation, hereinafter referred to as "Shareholder," DAVID L. LONG,...Stock Purchase Agreement • November 14th, 2000 • Pitt Des Moines Inc • Fabricated plate work (boiler shops) • California
