<SEC-DOCUMENT>0001047469-15-000248-index.html : 20150115
<SEC-HEADER>0001047469-15-000248.hdr.sgml : 20150115
<ACCEPTANCE-DATETIME>20150115170549
ACCESSION NUMBER:		0001047469-15-000248
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20150305
FILED AS OF DATE:		20150115
DATE AS OF CHANGE:		20150115
EFFECTIVENESS DATE:		20150115

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TETRA TECH INC
		CENTRAL INDEX KEY:			0000831641
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING SERVICES [8711]
		IRS NUMBER:				954148514
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0928

	FILING VALUES:
		FORM TYPE:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19655
		FILM NUMBER:		15530547

	BUSINESS ADDRESS:	
		STREET 1:		3475 EAST FOOTHILL BOULEVARD
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91107
		BUSINESS PHONE:		6263514664

	MAIL ADDRESS:	
		STREET 1:		3475 EAST FOOTHILL BOULEVARD
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91107
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>a2222708zdef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: a2222708zdef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g176447.jpg
<DESCRIPTION>G176447.JPG
<TEXT>
Document 2 - file: g176447.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g685935.jpg
<DESCRIPTION>G685935.JPG
<TEXT>
Document 3 - file: g685935.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g468622.jpg
<DESCRIPTION>G468622.JPG
<TEXT>
Document 4 - file: g468622.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g1009922.jpg
<DESCRIPTION>G1009922.JPG
<TEXT>
Document 5 - file: g1009922.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g537680.jpg
<DESCRIPTION>G537680.JPG
<TEXT>
Document 6 - file: g537680.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g756026.jpg
<DESCRIPTION>G756026.JPG
<TEXT>
Document 7 - file: g756026.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g172806.jpg
<DESCRIPTION>G172806.JPG
<TEXT>
Document 8 - file: g172806.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g723064.jpg
<DESCRIPTION>G723064.JPG
<TEXT>
Document 9 - file: g723064.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g93020.jpg
<DESCRIPTION>G93020.JPG
<TEXT>
Document 10 - file: g93020.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g117116.jpg
<DESCRIPTION>G117116.JPG
<TEXT>
Document 11 - file: g117116.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g21572bgi001.gif
<DESCRIPTION>G21572BGI001.GIF
<TEXT>
Document 12 - file: g21572bgi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g21572bgi002.gif
<DESCRIPTION>G21572BGI002.GIF
<TEXT>
Document 13 - file: g21572bgi002.gif

</DOCUMENT>
</SEC-DOCUMENT>