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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 WAdnm9X8kp1GlHVjXGZOLNHEAMOMkh4OvYuDNtbmBIye40ZXhLmzs/nZZ+XwtBXc
 m8rQZMzr8gGLvIOUHxXWUQ==

<SEC-DOCUMENT>9999999995-07-001515.txt : 20070430
<SEC-HEADER>9999999995-07-001515.hdr.sgml : 20070430
<ACCEPTANCE-DATETIME>20070430001557
ACCESSION NUMBER:		9999999995-07-001515
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20070427
DATE AS OF CHANGE:		20070430
EFFECTIVENESS DATE:		20070427

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PUBLIC SERVICE CO OF COLORADO
		CENTRAL INDEX KEY:			0000081018
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				840296600
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-141416
		FILM NUMBER:		07797714

	BUSINESS ADDRESS:	
		STREET 1:		1225 17TH ST STE 900
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
		BUSINESS PHONE:		3035717511

	MAIL ADDRESS:	
		STREET 1:		P O BOX 840 STE 300
		CITY:			DENVER
		STATE:			CO
		ZIP:			80201
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2007-04-27</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>10:30:00</finalEffectivenessDispTime>
        <form>S-3</form>
        <filer>
            <cik>0000081018</cik>
            <entityName>PUBLIC SERVICE CO OF COLORADO</entityName>
            <fileNumber>333-141416</fileNumber>
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</TEXT>
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