-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 THGjpu/kC9ldwDABQ8du9FFyhjmTKnGwC3dLKNDxQOoZthW0NV81kWaud1QJSAnB
 zP/e0vdSGjJmCGqrU+bJcA==

<SEC-DOCUMENT>0001140361-10-011656.txt : 20100312
<SEC-HEADER>0001140361-10-011656.hdr.sgml : 20100312
<ACCEPTANCE-DATETIME>20100312172854
ACCESSION NUMBER:		0001140361-10-011656
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090915
FILED AS OF DATE:		20100312
DATE AS OF CHANGE:		20100312

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TORTOISE ENERGY INFRASTRUCTURE CORP
		CENTRAL INDEX KEY:			0001268533
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD

	BUSINESS ADDRESS:	
		STREET 1:		11550 ASH STREET, SUITE 300
		CITY:			LEAWOOD
		STATE:			KS
		ZIP:			66211
		BUSINESS PHONE:		913-981-1020

	MAIL ADDRESS:	
		STREET 1:		11550 ASH STREET, SUITE 300
		CITY:			LEAWOOD
		STATE:			KS
		ZIP:			66211

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARINER ASSET MANAGEMENT, LLC
		CENTRAL INDEX KEY:			0001483238
		STATE OF INCORPORATION:			KS
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678863

	BUSINESS ADDRESS:	
		STREET 1:		4200 W. 115TH STREET, SUITE 100
		CITY:			LEAWOOD
		STATE:			KS
		ZIP:			66211
		BUSINESS PHONE:		913-647-9700

	MAIL ADDRESS:	
		STREET 1:		4200 W. 115TH STREET, SUITE 100
		CITY:			LEAWOOD
		STATE:			KS
		ZIP:			66211

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PALMER SQUARE CAPITAL ADVISORS LLC
		CENTRAL INDEX KEY:			0001483308
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678867

	BUSINESS ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112
		BUSINESS PHONE:		816-994-3201

	MAIL ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GUILFORD CAPITAL MANAGEMENT LLC
		CENTRAL INDEX KEY:			0001483312
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678866

	BUSINESS ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112
		BUSINESS PHONE:		816-994-3201

	MAIL ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ASCENT INVESTMENT PARTNERS, LLC
		CENTRAL INDEX KEY:			0001483324
		STATE OF INCORPORATION:			MO
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678865

	BUSINESS ADDRESS:	
		STREET 1:		1401 SOUTH BRENTWOOD BLVD, SUITE 390
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63144
		BUSINESS PHONE:		314-227-3275

	MAIL ADDRESS:	
		STREET 1:		1401 SOUTH BRENTWOOD BLVD, SUITE 390
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63144

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PALMER SQUARE CAPITAL MANAGEMENT, LLC
		CENTRAL INDEX KEY:			0001483325
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678868

	BUSINESS ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112
		BUSINESS PHONE:		816-994-3201

	MAIL ADDRESS:	
		STREET 1:		ONE WARD PARKWAY, SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NATIONS GROUP ADVISORS, LLC
		CENTRAL INDEX KEY:			0001486839

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		10678864

	BUSINESS ADDRESS:	
		STREET 1:		ONE WARD PARKWAY
		STREET 2:		SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112
		BUSINESS PHONE:		816-994-3201

	MAIL ADDRESS:	
		STREET 1:		ONE WARD PARKWAY
		STREET 2:		SUITE 126
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64112

	FORMER NAME:	
		FORMER CONFORMED NAME:	Nations Group Advisors, LLC
		DATE OF NAME CHANGE:	20100310
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2009-09-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001268533</issuerCik>
        <issuerName>TORTOISE ENERGY INFRASTRUCTURE CORP</issuerName>
        <issuerTradingSymbol>TYG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483312</rptOwnerCik>
            <rptOwnerName>GUILFORD CAPITAL MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483324</rptOwnerCik>
            <rptOwnerName>ASCENT INVESTMENT PARTNERS, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001486839</rptOwnerCik>
            <rptOwnerName>NATIONS GROUP ADVISORS, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483238</rptOwnerCik>
            <rptOwnerName>MARINER ASSET MANAGEMENT, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET, SUITE 100</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483325</rptOwnerCik>
            <rptOwnerName>PALMER SQUARE CAPITAL MANAGEMENT, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483308</rptOwnerCik>
            <rptOwnerName>PALMER SQUARE CAPITAL ADVISORS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4200 W. 115TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Affiliate of Inv Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>This Form 3 is filed today and reports the same securities by the following six filers: Guilford Capital Management, LLC, Ascent Investment Partners, LLC, The Nations Group Advisors, LLC, Mariner Asset Management, LLC, Palmer Square Capital Management, LLC and Palmer Square Capital Advisors, LLC</remarks>

    <ownerSignature>
        <signatureName>/s/ Martin C. Bicknell, on behalf of other reporting persons</signatureName>
        <signatureDate>2010-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
