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Northwest Pipeline LLC Notice Detail

Northwest Pipeline LLC

NOTICE # 20-014
Draft Tariff Filing – Renewable Natural Gas posted on Feb 12 2020 3:00PM

TSP Name:  Northwest Pipeline LLC     TSP:  67977322

Critical:  N
Notice Stat Desc:  INITIATE
Notice Type Desc:  OTHER
Post D/T:  02/12/2020 3:00 PM MCT
Notice Eff D/T:  02/12/2020 3:00 PM MCT
Notice End D/T:  
Reqrd Rsp Desc:  No response required
Rsp D/T:  

Notice ID:  20-014
Prior Notice:  
Subject:  Draft Tariff Filing – Renewable Natural Gas

Notice Text:

Northwest offers its customers an opportunity to review its major tariff filings prior to filing them with

FERC. Northwest asks that you provide any comments or concerns on or before February 18, 2020, so

Northwest can respond prior to the filing being submitted to FERC. Please direct comments and concerns

to Dave Madsen (801-584-6864).


The purpose of this filing is to expand Northwest’s tariff (“Tariff”) language regarding renewable natural

gas (“RNG”) in order to support the Pacific Northwest regions’ efforts to reduce its carbon footprint.

Recently published reports by Oregon and Washington show that they each have the potential to

produce approximately 10-15 Bcf/year of RNG via anerobic digestion.  While not all of this potential RNG

supply will be connected to an interstate pipeline, due to either the lack of proximity of the RNG source

and/or the inability to produce enough RNG to justify the connection costs, Northwest welcomes and

anticipates a portion of this RNG supply will be positioned to flow on to its system for distribution within

the western U.S.


Northwest’s proposed Tariff language will permit RNG sources to have up to a four percent inerts

substance level and a minimum 970 BTU level when Northwest, in its reasonable judgement, determines

it can blend the RNG supply with other gas supplies and still meet its Tariff’s gas quality delivery

requirements.  Northwest’s Tariff, however, will specifically prohibit receipt of RNG from hazardous waste



A draft copy of the proposed filing is available on Northwest's website under Regulatory/Proposed Tariff

Filings at the following link: