<SEC-DOCUMENT>0000073020-20-000005-index.html : 20200331 <SEC-HEADER>0000073020-20-000005.hdr.sgml : 20200331 <ACCEPTANCE-DATETIME>20200331163129 ACCESSION NUMBER: 0000073020-20-000005 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 17 CONFORMED PERIOD OF REPORT: 20200331 ITEM INFORMATION: Other Events ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20200331 DATE AS OF CHANGE: 20200331 FILER: COMPANY DATA: COMPANY CONFORMED NAME: NORTHWEST NATURAL GAS CO CENTRAL INDEX KEY: 0000073020 STANDARD INDUSTRIAL CLASSIFICATION: NATURAL GAS DISTRIBUTION [4924] IRS NUMBER: 930256722 STATE OF INCORPORATION: OR FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-15973 FILM NUMBER: 20762156 BUSINESS ADDRESS: STREET 1: ONE PACIFIC SQUARE STREET 2: 220 NW SECOND AVE CITY: PORTLAND STATE: OR ZIP: 97209 BUSINESS PHONE: 5032264211 MAIL ADDRESS: STREET 1: 220 NW SECOND AVENUE CITY: PORTLAND STATE: OR ZIP: 97209 </SEC-HEADER> <DOCUMENT> <TYPE>8-K <SEQUENCE>1 <FILENAME>a2020q1form8-kxmarchde.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: a2020q1form8-kxmarchde.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.A <SEQUENCE>2 <FILENAME>companymtntakedownopin.htm <DESCRIPTION>EXHIBIT 5.A <TEXT> Document 2 - file: companymtntakedownopin.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.B <SEQUENCE>3 <FILENAME>mlbmtntakedownopinion.htm <DESCRIPTION>EXHIBIT 5.B <TEXT> Document 3 - file: mlbmtntakedownopinion.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>4 <FILENAME>nwn-20200331.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT <TEXT> Document 4 - file: nwn-20200331.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.CAL <SEQUENCE>5 <FILENAME>nwn-20200331_cal.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT <TEXT> Document 5 - file: nwn-20200331_cal.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.DEF <SEQUENCE>6 <FILENAME>nwn-20200331_def.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT <TEXT> Document 6 - file: nwn-20200331_def.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>7 <FILENAME>nwn-20200331_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT <TEXT> Document 7 - file: nwn-20200331_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>8 <FILENAME>nwn-20200331_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT <TEXT> Document 8 - file: nwn-20200331_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>nwn4chza28.jpg <TEXT> Document 9 - file: nwn4chza28.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>10 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 10 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>11 <FILENAME>a2020q1form8-kxmarchde_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 11 - file: a2020q1form8-kxmarchde_htm.html
Document 11 - RAW XML: a2020q1form8-kxmarchde_htm.xml
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>12 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 12 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>14 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 14 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>EXCEL <SEQUENCE>15 <FILENAME>Financial_Report.xlsx <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 15 - file: Financial_Report.xlsx
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>16 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 16 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>17 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 17 - file: FilingSummary.html
Document 17 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>18 <FILENAME>0000073020-20-000005-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 18 - file: 0000073020-20-000005-xbrl.zip
</DOCUMENT> </SEC-DOCUMENT>