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SEC Edgar

NORTHWEST NATURAL GAS CO

SIC 4924 · Natural Gas Distribution
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NORTHWEST NATURAL GAS CO

CIK:0000073020|SEC Filings

INDENTURES

EX-4.1
ex41-nwnaturalx29thsupplem.htm
2026-09-03T00:00:00Z
EX-4.1
ex41-nwnaturalx28thsupplem.htm
2025-12-16T00:00:00Z
EX-4.S
ex4s2024notepurchaseagre.htm
2025-02-28T00:00:00Z
EX-4.T
ex4tusbanknorthwestnatur.htm
2025-02-28T00:00:00Z
EX-4.V
ex4vsienergy-opcoexatoam.htm
2025-02-28T00:00:00Z
EX-4.U
ex4ujpmorgantermloancred.htm
2025-02-28T00:00:00Z
EX-4.R
ex4rnorthwestnaturalcibc.htm
2024-02-23T00:00:00Z
EX-4.Q
ex4qnotepurchaseagreement.htm
2024-02-23T00:00:00Z
EX-4.1
conformed-26thsupplemental.htm
2023-08-07T00:00:00Z
EX-4.I
ex4iamendedandrestatedcred.htm
2023-02-24T00:00:00Z
EX-4.J
ex4jamendedandrestatedcred.htm
2023-02-24T00:00:00Z
EX-4.1
exhibit41nwn25thsupplement.htm
2023-01-06T00:00:00Z
EX-4.1
exhibit41supplementalinden.htm
2022-09-30T00:00:00Z
EX-4.2
exhibit42northwestnaturalo.htm
2021-11-05T00:00:00Z
EX-4.1
exhibit41northwestnaturalh.htm
2021-11-05T00:00:00Z
EX-4.1
exhibit41nwnaturaltermloan.htm
2021-06-14T00:00:00Z
EX-4.2
exhibit42nwnwatertermloan.htm
2021-06-14T00:00:00Z
EX-4.1
northwestnaturalgaster.htm
2020-03-25T00:00:00Z
EX-4.J
ex4jdescriptionofsecur.htm
2020-03-02T00:00:00Z
EX-4.1
ex41bmonnwcreditagreem.htm
2019-08-06T00:00:00Z