<SEC-DOCUMENT>0001140361-12-039157.txt : 20120904
<SEC-HEADER>0001140361-12-039157.hdr.sgml : 20120903
<ACCEPTANCE-DATETIME>20120904125300
ACCESSION NUMBER:		0001140361-12-039157
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20120901
FILED AS OF DATE:		20120904
DATE AS OF CHANGE:		20120904

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MacKenna Peter E
		CENTRAL INDEX KEY:			0001556996

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31993
		FILM NUMBER:		121070255

	MAIL ADDRESS:	
		STREET 1:		20810 FERNBUSH LANE
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77073

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STERLING CONSTRUCTION CO INC
		CENTRAL INDEX KEY:			0000874238
		STANDARD INDUSTRIAL CLASSIFICATION:	HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600]
		IRS NUMBER:				251655321
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2751 CENTERVILLE RD.
		STREET 2:		SUITE 3131
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19803
		BUSINESS PHONE:		3024789170

	MAIL ADDRESS:	
		STREET 1:		20810 FERNBUSH LANE
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77073

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OAKHURST CO INC
		DATE OF NAME CHANGE:	19950831

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OAKHURST CAPITAL INC
		DATE OF NAME CHANGE:	19931130
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
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<DESCRIPTION>FORM 3
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<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2012-09-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000874238</issuerCik>
        <issuerName>STERLING CONSTRUCTION CO INC</issuerName>
        <issuerTradingSymbol>STRL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001556996</rptOwnerCik>
            <rptOwnerName>MacKenna Peter E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20810 FERNBUSH LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77073</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
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    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Roger M Barzun Under a Power of Attorney</signatureName>
        <signatureDate>2012-09-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Forms 3, 4 &amp; 5)</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-VARIANT: small-caps">Know all men by these presents</font>, that I, the undersigned <font style="DISPLAY: inline; FONT-WEIGHT: bold">Peter E. MacKenna</font>, hereby constitute and appoint each of <font style="DISPLAY: inline; FONT-WEIGHT: bold">Maarten D. Hemsley</font>, <font style="DISPLAY: inline; FONT-WEIGHT: bold">Elizabeth D. Brumley</font>, and <font style="DISPLAY: inline; FONT-WEIGHT: bold">Roger M. Barzun</font> signing singly, my true and lawful attorney-in-fact to do each of the following:</font></div>

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<div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To execute for me and on my behalf in my capacity as a director and as an officer of Sterling Construction Company, Inc., a Delaware corporation (the "<font style="DISPLAY: inline; FONT-STYLE: italic">Company</font>") United States Securities and Exchange Commission Forms 3, 4 and 5 and any amendments thereto in accordance with Section 16(a) of the Securities Exchange Act of 1934 (the "<font style="DISPLAY: inline; FONT-STYLE: italic">34 Act</font>") and the rules thereunder.</font></div>
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<div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To do and perform any and all acts for me and on my behalf that may be necessary or desirable to complete and execute any such Form 3, 4 or 5 and to timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority.</font></div>
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<div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To take any other action of any type whatsoever in connection with the foregoing that in the opinion of such attorney-in-fact is required of me, or may be of benefit to me or in my best interests, it being understood that the documents executed by such attorney-in-fact on my behalf pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in his discretion.</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">I hereby grant to each such attorney-in-fact full power and authority to do and perform each and every act and thing whatsoever requisite, necessary or proper in the exercise of any of the rights and powers granted herein as fully to all intents and purposes as I might or could do in person, with full power of substitution and revocation, hereby ratifying and confirming all that such attorney-in-fact or his or her substitute or substitutes shall lawfully do or cause to be done by virtue of this Power of Attorney.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">I acknowledge that none of the foregoing attorneys-in-fact in serving in such capacity at my request is assuming, and the Company is not assuming, any of my responsibilities to comply with Section 16 of the 34 Act.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This Power of Attorney shall remain in full force and effect until I am no longer required to file Form 4 and/or Form 5 with respect to my holdings of, and any transactions in, securities issued by the Company, or until earlier revoked by me in a signed writing delivered to each of the foregoing attorneys-in-fact.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-VARIANT: small-caps">In witness whereof</font>, I have executed this Power of Attorney as of August 27, 2012.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Peter E. MacKenna</font></font></font></div>
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