<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE DYCOM
INDUSTRIES, INC. CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS FOR
ALL PERIODS PRESENTED AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
CONSOLIDATED FINANCIAL STATEMENTS.
</LEGEND>

                                                                          
<PERIOD-TYPE>                   YEAR                        YEAR                   YEAR
<FISCAL-YEAR-END>                          JUL-31-1997             JUL-31-1998             JUL-31-1999
<PERIOD-START>                             JUL-31-1996             JUL-31-1997             JUL-31-1998
<PERIOD-END>                               JUL-31-1997             JUL-31-1998             JUL-31-1999
<CASH>                                       5,276,112              35,927,307              97,955,007
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                               49,241,590              63,022,011              98,179,792
<ALLOWANCES>                                 1,029,093               2,210,978               4,129,280
<INVENTORY>                                 12,277,114              16,449,417              43,101,631
<CURRENT-ASSETS>                            70,336,712             118,193,282             241,129,345
<PP&E>                                      83,287,399              97,794,772             148,160,838
<DEPRECIATION>                              46,951,187              54,929,575              68,749,956
<TOTAL-ASSETS>                             112,511,881             166,318,091             384,549,726
<CURRENT-LIABILITIES>                       49,434,042              46,378,616              78,605,798
<BONDS>                                     31,307,802              18,135,772              12,420,981
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                     6,333,938               7,361,366               8,542,663
<OTHER-SE>                                  36,092,854              91,017,582             278,747,916
<TOTAL-LIABILITY-AND-EQUITY>               112,511,881             166,318,091             384,549,726
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                           311,238,108             368,713,563             470,136,925
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                              246,025,594             285,038,220             347,719,784
<OTHER-EXPENSES>                            11,814,577              13,496,694              20,143,191
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                           2,619,191               2,045,571               1,695,920
<INCOME-PRETAX>                             23,770,489              36,081,264              60,612,322
<INCOME-TAX>                                 7,956,851              13,045,644              24,162,347
<INCOME-CONTINUING>                         15,813,638              23,035,620              36,449,975
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                15,813,638              23,035,620              36,449,975
<EPS-BASIC>                                       0.84                    1.09                    1.58
<EPS-DILUTED>                                     0.83                    1.07                    1.55