<SEC-DOCUMENT>0000110019-19-000005-index.html : 20190221
<SEC-HEADER>0000110019-19-000005.hdr.sgml : 20190221
<ACCEPTANCE-DATETIME>20190221164024
ACCESSION NUMBER:		0000110019-19-000005
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20181231
FILED AS OF DATE:		20190221
DATE AS OF CHANGE:		20190221

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NORTHWEST PIPELINE LLC
		CENTRAL INDEX KEY:			0000110019
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				261157701
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07414
		FILM NUMBER:		19622432

	BUSINESS ADDRESS:	
		STREET 1:		295 CHIPETA WAY
		CITY:			SALT LAKE CITY
		STATE:			UT
		ZIP:			84108
		BUSINESS PHONE:		801-583-8800

	MAIL ADDRESS:	
		STREET 1:		295 CHIPETA WAY
		CITY:			SALT LAKE CITY
		STATE:			UT
		ZIP:			84108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NORTHWEST PIPELINE GP
		DATE OF NAME CHANGE:	20071002

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NORTHWEST PIPELINE CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>nwp_20181231x10ka.htm
<DESCRIPTION>10-K/A
<TEXT>
Document 1 - file: nwp_20181231x10ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>2
<FILENAME>nwp_20181231xex-311.htm
<DESCRIPTION>EX-31.1
<TEXT>
Document 2 - file: nwp_20181231xex-311.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>3
<FILENAME>nwp_20181231xex-312.htm
<DESCRIPTION>EX-31.2
<TEXT>
Document 3 - file: nwp_20181231xex-312.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32
<SEQUENCE>4
<FILENAME>nwp_20181231xex-32.htm
<DESCRIPTION>EX-32
<TEXT>
Document 4 - file: nwp_20181231xex-32.htm

</DOCUMENT>
</SEC-DOCUMENT>