FORM OF UNDERWRITING AGREEMENT] 13,000,000 Shares INFRASOURCE SERVICES, INC. Common Stock UNDERWRITING AGREEMENTUnderwriting Agreement • March 17th, 2006 • Infrasource Services Inc • Water, sewer, pipeline, comm & power line construction • New York
LEHMAN BROTHERS INC. CREDIT SUISSE SECURITIES (USA) LLC MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED FIRST ALBANY CAPITAL INC. As Representatives of the several Underwriters named in Schedule 1 attached hereto, c/o Lehman Brothers Inc. 745 Seventh Avenue New York, New York 10019 Ladies and Gentlemen:
