<SEC-DOCUMENT>0001562180-20-005971.txt : 20200911
<SEC-HEADER>0001562180-20-005971.hdr.sgml : 20200911
<ACCEPTANCE-DATETIME>20200911172043
ACCESSION NUMBER:		0001562180-20-005971
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200911
FILED AS OF DATE:		20200911
DATE AS OF CHANGE:		20200911

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ESTES TIMOTHY R
		CENTRAL INDEX KEY:			0001249250

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10613
		FILM NUMBER:		201171773

	MAIL ADDRESS:	
		STREET 1:		11780 U.S. HIGHWAY 1
		STREET 2:		SUITE 600
		CITY:			PALM BEACH GARDENS
		STATE:			FL
		ZIP:			33408

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DYCOM INDUSTRIES INC
		CENTRAL INDEX KEY:			0000067215
		STANDARD INDUSTRIAL CLASSIFICATION:	WATER, SEWER, PIPELINE, COMM AND POWER LINE CONSTRUCTION [1623]
		IRS NUMBER:				591277135
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			0130

	BUSINESS ADDRESS:	
		STREET 1:		11780 U.S. HIGHWAY 1
		STREET 2:		SUITE 600
		CITY:			PALM BEACH GARDENS
		STATE:			FL
		ZIP:			33408
		BUSINESS PHONE:		561-627-7171

	MAIL ADDRESS:	
		STREET 1:		11780 U.S. HIGHWAY 1
		STREET 2:		SUITE 600
		CITY:			PALM BEACH GARDENS
		STATE:			FL
		ZIP:			33408

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MOBILE HOME DYNAMICS INC
		DATE OF NAME CHANGE:	19820302
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-09-11</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0000067215</issuerCik>
        <issuerName>DYCOM INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>DY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001249250</rptOwnerCik>
            <rptOwnerName>ESTES TIMOTHY R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11780 U.S. HIGHWAY 1</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>PALM BEACH GARDENS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33408</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Executive VP &amp; COO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-09-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>202.00</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>306640.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-09-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>91.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>55.38</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>306549.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of DY common stock acquired upon the settlement of restricted stock units (&quot;RSUs&quot;) on September 11, 2020. Each RSU represents a contingent right to acquire one share of DY common stock upon the satisfaction of pre-established performance measures set forth in the award documents. The annual performance measures are based on (i) operating earnings and (ii) the ratio of operating cash flow to net income, in each case before certain items.</footnote>
        <footnote id="F2">No consideration was paid for the restricted stock units.</footnote>
        <footnote id="F3">Withholding of common stock for the payment of tax liability incident to the vesting of restricted stock units.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Ryan F. Urness, Attorney-in-Fact for Timothy R. Estes</signatureName>
        <signatureDate>2020-09-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
