NEWS RELEASE FOR IMMEDIATE RELEASE

Contact: Steven E. Nielsen, President and CEO
Richard L. Dunn, Senior Vice President and CFO
(561) 627-7171

Palm Beach Gardens, Florida

February 23, 2005

DYCOM INDUSTRIES, INC. ANNOUNCES PLANS TO RELEASE FISCAL 2005 SECOND QUARTER EARNINGS AND SCHEDULES A CONFERENCE CALL

Palm Beach Gardens, Florida, February 23, 2005 — Dycom Industries, Inc. (NYSE Symbol: "DY") will release its fiscal 2005 second quarter earnings on Monday, February 28, 2005, after the close of trading on the New York Stock Exchange.

Dycom has scheduled a conference call for Tuesday, March 1, 2005, at 9:00 a.m. (ET). To participate in the conference call, dial 800-288-8975 (United States) or 612-332-0802 (International) ten minutes before the conference call begins and ask for the "Dycom Earnings" conference call. A live webcast of the conference call will be available at http://www.dycomind.com. If you are unable to attend the conference call at the scheduled time, a replay of the live webcast will also be available at http://www.dycomind.com until Thursday, March 31, 2005.

Dycom is a leading provider of engineering, construction, and maintenance services to telecommunication providers throughout the United States. Additionally, the Company provides similar services related to the installation of integrated voice, data, and video local and wide area networks within office buildings and similar structures. Dycom also provides underground utility locating and mapping and electric utility construction services. Visit our web site at http://www.dycomind.com for additional corporate information.