<SUBMISSION>
<ACCESSION-NUMBER>0001293788-04-000018
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20041215
<FILING-DATE>20041215
<DATE-OF-FILING-DATE-CHANGE>20041215
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Roberts John
<CIK>0001308971
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-32385
<FILM-NUMBER>041205386
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>612-8232-5996
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O MACQUARIE INFRASTRUCTURE FUND ADVISE
<STREET2>600 FIFTH AVENUE, LEVEL 21
<CITY>NEW YORK
<STATE>NY
<ZIP>10020
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Macquarie Infrastructure CO Trust
<CIK>0001289788
<ASSIGNED-SIC>5172
<IRS-NUMBER>206196808
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>600 FIFTH AVENUE, 21ST FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10020
<PHONE>212-548-6555
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>600 FIFTH AVENUE, 21ST FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10020
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Macquarie Infrastructure Assets Trust
<DATE-CHANGED>20040510
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-12-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001289788</issuerCik>
        <issuerName>Macquarie Infrastructure CO Trust</issuerName>
        <issuerTradingSymbol>MIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001308971</rptOwnerCik>
            <rptOwnerName>Roberts John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MACQUARIE INFRASTRUCTURE FUND ADVISE</rptOwnerStreet1>
            <rptOwnerStreet2>600 FIFTH AVENUE, LEVEL 21</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>No securities beneficially owned</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <remarks>Exhibit List
-------------
Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Heidi Mortensen, by power of attorney</signatureName>
        <signatureDate>2004-12-15</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poaroberts.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
                                POWER OF ATTORNEY			Ex.24
                                -----------------


         The undersigned, John Roberts (the "Undersigned"), does hereby
nominate, constitute and appoint each of Heidi Mortensen and Peter Stokes
(individually, an "Attorney-in-Fact") as the Undersigned's true and lawful agent
and attorney-in-fact, with full power and authority of substitution and
revocation and to act singly hereunder, in the discretion of such
Attorney-in-Fact, in the name of and on behalf of the Undersigned as fully as
the Undersigned could if the Undersigned were present and acting in person, to
perform any and all acts that may be necessary or desirable to complete, make
and execute any and all required or voluntary filings (the "Filings") under
Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and the applicable rules and regulations thereunder, with the Securities
and Exchange Commission, the New York Stock Exchange, Macquarie Infrastructure
Company LLC (the "Company"), and any other person or entity to which such
filings may be required under Section 16(a) of the Exchange Act as a result of
the Undersigned's position as an officer and/or director of the Company or the
Undersigned's "Beneficial Ownership" (within the meaning of Section 16(a) of the
Exchange Act) of more than ten percent of any class of equity securities of the
Company.

         The Undersigned hereby consents to, ratifies and confirms all that the
said Attorney-in-Fact shall do or cause to be done by virtue of this Power of
Attorney. The Undersigned hereby acknowledges that the Attorney-in-Fact, in
serving in such capacity at the request of the Undersigned, is not assuming, nor
is the Company assuming, any of the Undersigned's responsibilities to comply
with Section 16 of the Exchange Act.

         This Power of Attorney shall remain in full force and effect from this
date forward for the term of the Undersigned's service as an officer and/or
director of the Company or the Undersigned's Beneficial Ownership of more than
ten percent of any class of equity securities of the Company and for such time
thereafter as may be necessary to make any such Filings, unless earlier revoked
or modified by the Undersigned in writing. The Undersigned hereby revokes all
prior powers of attorney relating to the foregoing acts.

         IN WITNESS WHEREOF, the Undersigned has hereunto signed this Power of
Attorney this 15th day of December, 2004.


                                        By:  /s/ John Roberts
                                             ----------------
                                             Name: John Roberts

</TEXT>
</DOCUMENT>
</SUBMISSION>
