Flexible Renewable Storage Potential
PROGRESSIVE REGULATION
KEY MECHANISMS:
Decoupling/WARM
Purchased Gas Adjustment
Environmental Cost
Incentive Sharing(1)
RATE CASE TEST YEAR
CURRENT RATE STRUCTURES:
ROE
ROR
Equity Ratio
2020 Rate Base (3)
OREGON
WASHINGTON
Forward
Multiyear(2)
9.4%
6.965%
Not determined
6.814%
50%
Not determined
$1.5B
$0.2B
19
(1) In Oregon, NW Natural shares PGA gains and losses
(2) In 2019, SB 5116 was passed granting the WUTC authority to incorporate costs and capital up to 48 months after the rate effective date. In
2021, SB 5295 was passed requiring multiyear general rate plans that include performance based measures.
(3) Rate base is a 13-month average ending 12/31/20. Oregon rate base includes gas reserves and North Mist gas storage facility
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