0000950134-04-001868 424B3 1 20040217 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 424B3 33 333-111738 04601786 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 424B3 1 h12463b3e424b3.txt QUANTA SERVICES, INC. - REG. NO. 333-111738