Capital Program Planning for Oregon Gas Utilities

by | Oct 21, 2026

Oregon · Natural Gas Utilities

Oregon caps gas emissions 90% by 2050. Your capital plan is where that math gets settled.

NW Natural, Avista, and Cascade serve roughly two million Oregonians on a system that is unusually modern — and squarely in the path of the reinstated Climate Protection Program, a gas-ban fight in Eugene, and an RNG build-out. Every one of those forces changes which projects earn a dollar and when. Invizion helps gas utilities re-sequence a capital portfolio in a click — and defend every decision.

See how Invizion helps utilities See what Oregon utilities face Download the briefing (PDF)
The bottom line: Oregon's gas system is unusually modern — almost no legacy cast-iron pipe — but a reinstated Climate Protection Program that caps emissions 90% by 2050, plus gas-ban fights and an RNG build-out, turns long-lived assets into a stranded-cost question. The utilities that hold value will be the ones whose capital plans can re-sequence as fast as the policy does.
~2M1
People served by NW Natural across Oregon and southwest Washington — the state's dominant gas LDC.
809,9182
Residential natural gas customers in Oregon in 2024, up steadily from 764,000 in 2019.
$2.6–2.9B3
NW Natural's planned capital expenditures for 2026–2030.
−90%4
Emissions cut the Climate Protection Program requires from natural gas and other fossil fuels by 2050.

The Oregon Landscape

Four forces are moving your project list at once

Oregon's gas system is younger and cleaner than most, but that is no shield. Decarbonization policy, a declining-throughput risk, winter price swings, and a capital-recovery process built on full rate cases all press on the same plan — the one you approved last year may already be the wrong one.

System Integrity & Safety

A modern system still has to be proven, every year

NW Natural runs about 806,000 meters in Oregon and southwest Washington and reports “one of the most modern distribution systems in the country, with no identified cast iron pipe or bare steel main.”5 That removes the legacy-pipe overhang other states carry — but a system operating since 1859 still demands continuous integrity management, leak survey, and replacement capital.6

The safety case never closes: PHMSA distribution-integrity obligations, growth tie-ins, and reliability upgrades all compete for the same dollars as the decarbonization work below.

Decarbonization Pressure

The stranded-asset question, in law

Oregon's Climate Protection Program — invalidated on procedural grounds and readopted by DEQ in 2024 — puts a declining cap on emissions from natural gas and other fuels, requiring a 50% cut by 2035 and 90% by 2050; its first compliance period began January 1, 2025.4 Statewide emissions were still about 5% above 1990 levels in 2023, so the cap bites.9

Eugene adopted a ban on gas in new low-rise homes in early 2023, then repealed it that July after NW Natural bankrolled a $1 million-plus referendum campaign.7 Renewable natural gas is the hedge — Oregon's SB 98 authorized utility RNG programs in 20198 — but NW Natural's own 5%-by-2024 RNG goal was met at under 1%.6 Every long-horizon dollar now carries throughput risk.

Supply, Price & Reliability

Design-day peaks and a volatile commodity

Winter reliability rests on storage and interstate capacity. NW Natural's Mist field holds 17.5 Bcf (12.8 Bcf reserved for utility customers) and can deliver 5.3 million therms a day at peak.5

The commodity itself swings: Oregon's average residential gas price jumped to about $15.71 per thousand cubic feet in 2024, up from $12.83 in 2022.10 Design-day planning and cost recovery for those swings sit right beside the capital plan.

Capital Recovery & Rates

Recovery runs through full rate cases, not autopilot

Oregon has no automatic infrastructure-replacement surcharge of the ISRS/DSIC type; NW Natural, Avista, and Cascade recover capital chiefly through periodic general rate cases before the Oregon PUC. NW Natural filed one in December 2024.5

With planned capital of $500–$550 million in 2026 alone and a recent Oregon settlement worth about $13.0 million in annual revenue,3 the tension is affordability: rising bills meet a shrinking base of customers to spread costs across.

Who Delivers Oregon's Gas

Three investor-owned LDCs — and almost no one else

Oregon is unusual: its retail gas is delivered entirely by three PUC-regulated investor-owned utilities, with no municipal or cooperative gas systems of note. NW Natural dominates; Avista and Cascade serve the south and the east.

Investor-owned gas LDCs

Rates & capital recovery regulated by the Oregon PUC

NW Natural ~806,000 meters; ~88% in Oregon; serves ~2M people51
Avista ~369,000 gas customers across 4 NW states; Oregon territory centered on Medford / Rogue Valley11
Cascade Natural Gas 314,500+ customers; 28 Oregon communities incl. Bend, Pendleton, Hermiston12

NW Natural, founded in Portland in 1859, is the state's dominant LDC; capital plans call for $2.6–$2.9 billion over 2026–2030.3

Municipal, public & supply-side gas

Oregon has essentially no municipal or coop gas utilities

(No municipal / cooperative gas) Unlike many states, Oregon's retail gas is delivered entirely by the three regulated LDCs at left.
Northwest Pipeline (Williams) Interstate transmission that brings supply into the Oregon market.
Mist Underground Storage (NW Natural) 17.5 Bcf capacity; 12.8 Bcf reserved for utility customers.5
Energy Trust of Oregon Ratepayer-funded efficiency & RNG programs that shape gas demand.

Cascade Natural Gas is a subsidiary of MDU Resources; Avista is Spokane-based — so even Oregon's “other” LDCs answer to out-of-state parents and the Oregon PUC.13

Rate-Setting & Oversight

Every capital dollar has to survive a rate case

Oregon recovers gas infrastructure the slow way — through full general rate cases, not an automatic surcharge — while a hard emissions cap reshapes what “used and useful” even means.

  • Oregon Public Utility Commission (OPUC) sets rates and approves capital recovery for NW Natural, Avista, and Cascade. Oregon has no ISRS/DSIC-style automatic infrastructure surcharge, so most replacement and growth capital flows through periodic general rate cases.5
  • NW Natural's December 2024 general rate case is the mechanism by which its current build-out reaches customer bills; a recent Oregon settlement added roughly $13.0 million in annual revenue.53
  • The Climate Protection Program is now a first-order regulatory driver: covered gas emissions must fall 50% by 2035 and 90% by 2050, the first compliance period is underway, and DEQ is still refining program rules (including the energy-intensive/trade-exposed track) into 2027.414
  • Affordability is the counterweight: residential gas prices rose to about $15.71/Mcf in 2024, and a shrinking or slower-growing customer base has to absorb every approved dollar of capital.10

Where The Capital Goes

Real dollars, moving in two directions at once

Oregon gas utilities are funding a modern, safe system while simultaneously paying to decarbonize it. Both claims land on the same balance sheet — the question is sequencing.

  • RNG supply: NW Natural paid $26.0 million and $25.4 million for two EDL renewable-natural-gas facilities that began deliveries in 2024, and contracted about 2,775,000 MMBtu a year for 2035–2042.5
  • Enabling policy: Oregon's SB 98 (2019) directed the OPUC to establish large and small renewable-natural-gas programs, letting gas utilities invest in and recover RNG — the legal basis for the spend above.8
  • Core capital program: NW Natural plans $500–$550 million of capital in 2026 and $2.6–$2.9 billion across 2026–2030 — system integrity, growth, and modernization.3
  • Recovery in rates: a recent Oregon rate settlement lifted NW Natural's annual revenue by about $13.0 million — a reminder that in Oregon the capital only earns once the PUC agrees.3

Where Invizion Fits

Turn Oregon's gas-system decisions into a defensible capital plan

Invizion is scenario-based capital portfolio optimization built for utilities. When a replacement mandate accelerates, throughput forecasts shift, or a decarbonization ruling lands, you don't re-plan by hand for weeks — you model it and decide with a record to stand behind.

1

Model the “what-if” before it's forced on you

A faster main-replacement schedule, a gas-line-extension ban, an RNG mandate — build the scenario and see the impact on the whole portfolio, side by side with today's plan.

2

Re-sequence 500 projects in a click

When priorities move, Invizion re-orders the portfolio automatically — accelerating, stretching, or deferring projects against the constraints you set, not weeks of spreadsheet surgery.

3

Give regulators or your board a defensible record

Every prioritization and trade-off is captured. When you're asked “why this project, why now,” the answer is documented — not reconstructed after the fact.

Oregon's Gas Sector, In Brief

Questions Oregon gas-utility leaders are asking

Short, sourced answers — the same facts we dig into with utilities looking hard at their capital programs.

Who delivers natural gas in Oregon?
Three investor-owned LDCs: NW Natural (the dominant provider, ~806,000 meters serving roughly two million people), Avista (southern Oregon, centered on the Medford area), and Cascade Natural Gas (314,500+ customers across 28 Oregon communities). Oregon has essentially no municipal or cooperative gas systems.511112
What is the Climate Protection Program and why does it matter to gas utilities?
It is Oregon DEQ's declining cap on emissions from natural gas and other fossil fuels, requiring a 50% reduction by 2035 and 90% by 2050. Struck down on procedural grounds and readopted in 2024, its first compliance period began January 1, 2025 — making long-lived gas assets a genuine stranded-cost question.4
Does Oregon have the aging cast-iron pipe problem other states face?
Largely no. NW Natural reports no identified cast iron or bare steel main and calls its system one of the most modern in the country. The capital pressure in Oregon comes less from legacy pipe and more from decarbonization policy and continuous integrity management.5
What happened with Eugene's gas ban?
Eugene's City Council adopted an ordinance in early 2023 barring natural gas in new low-rise residential buildings, then repealed it on July 10, 2023, after NW Natural funded a referendum campaign that raised over $1 million to force a public vote.7
How much are Oregon gas utilities investing?
NW Natural alone plans $500–$550 million of capital in 2026 and $2.6–$2.9 billion over 2026–2030, on top of RNG supply deals worth tens of millions — all recovered through Oregon PUC rate cases.35
How does Invizion help Oregon gas utilities plan capital?
Invizion is scenario-based capital portfolio optimization for utilities. It lets you model how a tighter emissions cap, an RNG commitment, a rate-case outcome, or slowing customer growth reshuffles your whole project list, re-sequence the portfolio automatically against your constraints, and keep a defensible record of every trade-off for the Oregon PUC or your board.

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About the Author

GB

Guy Barlow

President, Invizion

Guy Barlow leads Invizion, a capital lifecycle management platform for water and wastewater utilities. He has spent two decades at the intersection of utility capital programs, funding, and analytics, helping utilities make faster, more defensible capital decisions.

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Invizion helps utilities model, optimize, and defend their capital programs. Explore how it works, or read our latest thinking on capital planning across the utility sector.

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This briefing was last reviewed September 2026.

Sources

  1. NW Natural — company overview: serves approximately two million people across Oregon and southwest Washington. www.nwnatural.com
  2. U.S. Energy Information Administration — Oregon natural gas residential consumers: 809,918 (2024); 763,989 (2019). www.eia.gov
  3. NW Natural Holdings (via StockTitan) — planned capital $500–$550M for 2026 and $2.6–$2.9B for 2026–2030; ~$13.0M Oregon revenue increase. www.stocktitan.net
  4. Oregon DEQ — Climate Protection Program: 50% emissions reduction by 2035 and 90% by 2050; first compliance period began Jan. 1, 2025; readopted via 2024 rulemaking. www.oregon.gov/deq
  5. NW Natural Holdings Form 10-K (FY2024, filed Feb. 28, 2025) — ~806,000 meters (~88% Oregon); no identified cast iron or bare steel main; Mist storage 17.5 Bcf / 5.3M therms per day; EDL RNG facilities ($26.0M, $25.4M); Dec. 2024 OPUC rate case. www.sec.gov
  6. NW Natural company history — founded 1859 (Portland Gas Light Company); RNG goal of 5% by 2024 acquired at under 1%. en.wikipedia.org
  7. KLCC — Eugene natural gas ban (new low-rise residential) adopted early 2023, repealed July 10, 2023 after NW Natural-funded $1M+ referendum. www.klcc.org
  8. Oregon Legislature — Senate Bill 98 (2019, Ch. 541): directs the OPUC to establish large and small renewable natural gas programs. olis.oregonlegislature.gov
  9. Oregon DEQ — statewide greenhouse gas inventory: 2023 emissions about 5% above 1990 levels; transportation ~35%. www.oregon.gov/deq
  10. U.S. Energy Information Administration — Oregon residential natural gas price: $15.71/Mcf (2024), $15.77 (2023), $12.83 (2022). www.eia.gov
  11. Avista — about the company: natural gas to about 369,000 customers across four Northwest states (Oregon gas territory centered on the Medford region). www.myavista.com
  12. Cascade Natural Gas — more than 314,500 customers in 95 communities (67 Washington, 28 Oregon incl. Bend, Baker City, Pendleton, Hermiston). www.cngc.com
  13. Cascade Natural Gas Corporation — subsidiary of MDU Resources Group (acquired 2006). en.wikipedia.org
  14. Oregon DEQ — rulemaking docket showing the Climate Protection Program EITE 2027 rulemaking (program active and being refined). www.oregon.gov/deq