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Get filing alertsNorthwest Natural settles Washington rate case for $20.1M Year 1 increase, below request
Filed March 24, 2026 · Period ending March 23, 2026 · ~1 min read
Key Changes
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NW Natural filed settlement with Washington regulators for $20.1M Year 1 revenue increase (vs. $25.6M requested), with additional $7.7M Year 2 and $8.7M Year 3 increases, totaling $36.5M over three years pending approval.
Item 8.01 verify on EDGAR → -
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Settlement establishes 9.5% return on equity across all three years with rate base growing from $328M to $410.7M as new plant investments are added, representing $80.7M increase since 2021 rate case.
Item 8.01 verify on EDGAR → -
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Washington operations represent only 12% of customers and 8% of revenues, limiting overall financial impact to small portion of company's total business concentrated in Oregon.
Item 8.01 verify on EDGAR → -
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Plant investments after March 31, 2025 subject to prudence review with potential adjustments and refunds if actual costs differ from projections, creating some revenue uncertainty.
Item 8.01 verify on EDGAR → -
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Line extension allowance policy remains unresolved and will proceed through separate regulatory litigation, though this issue has lower materiality to overall settlement.
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Summary
Northwest Natural reached a settlement with Washington state regulators that would increase revenues by $20.1 million in Year 1, about 21% below the company's original $25.6 million request filed in August 2025. The three-year deal includes additional increases of $7.7 million and $8.7 million in Years 2 and 3, bringing total new revenues to $36.5 million.
The settlement locks in a 9.5% return on equity and allows the company to earn on a rate base growing from $328 million to $410.7 million as capital investments are added. For investors, the financial impact is modest since Washington represents just 8% of total company revenues, with the core business remaining in Oregon.
The settlement provides regulatory certainty and a reasonable return, though it includes a prudence review mechanism that could adjust revenues if actual plant costs differ from projections. New rates would take effect August 1, 2026, pending Washington Utilities and Transportation Commission approval. Watch for the commission's final order on the settlement and any developments on the unresolved line extension policy issue, which continues through separate litigation. The outcome could signal the regulatory environment for future rate cases in both Washington and Oregon markets.
Section-by-Section Diff
Event · Item 8.01 — Other Events
Item 8.01 — Other Events filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
On March 23, 2026, NW Natural, Staff of the WUTC, The Energy Project and the Alliance of Western Energy Consumers, which comprise all but one of the parties to the Rate Case, filed a settlement with the WUTC that addressed all issues but one in the Rate Case (Stipulation). The Stipulation provides for a $20.1 million revenue increase in Year 1, a $7.7 million revenue increase in Year 2 and an $8.7 million revenue increase in Year 3.
NW Natural filed a settlement agreement with Washington regulators for a three-year rate increase totaling $36.5 million ($20.1M + $7.7M + $8.7M). This is lower than the original request of $42.5 million filed in August 2025. The settlement covers all issues except the line extension allowance policy and requires WUTC approval before new rates take effect August 1, 2026.
Added in current filing · verify on EDGAR →
Plant placed into service after March 31, 2025 is subject to review, adjustment and refund according to actual costs incurred.
The settlement includes a prudence review mechanism for capital investments made after March 31, 2025. If actual costs differ from projections, the revenue requirement can be adjusted and refunds may be required, creating some uncertainty around the final approved amounts.
Show 1 minor / wording change
Added in current filing · verify on EDGAR →
The Stipulation does not address NW Natural's line extension allowance policy, which is subject to the ongoing regulatory litigation process.
One issue remains unresolved: the line extension allowance policy, which determines how costs are allocated for extending gas service to new customers. This issue will continue through separate regulatory litigation and is not covered by the settlement.
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Figures/quotes linked to EDGAR · Narrative written by AI · Jun 8, 2026 · How we verify