PSO December 31, Remaining Recovery Period 2020 2019 Regulatory Assets: (in millions) Current Regulatory Assets Under-recovered Fuel Costs - earns a return $ 30.1  $ —  1 year Total Current Regulatory Assets $ 30.1  $ —  Noncurrent Regulatory Assets Regulatory assets pending final regulatory approval: Regulatory Assets Currently Earning a Return Oklaunion Power Station Accelerated Depreciation $ 34.4  $ 27.4  Total Regulatory Assets Currently Earning a Return 34.4  27.4  Regulatory Assets Currently Not Earning a Return Storm-Related Costs 15.8  7.2  COVID-19 0.3  —  Total Regulatory Assets Currently Not Earning a Return 16.1  7.2  Total Regulatory Assets Pending Final Regulatory Approval 50.5  34.6  Regulatory assets approved for recovery: Regulatory Assets Currently Earning a Return Plant Retirement Costs - Unrecovered Plant (a) 180.8  167.0  20 years Environmental Control Projects 26.5  27.8  20 years Meter Replacement Costs 26.2  30.2  7 years Storm-Related Costs 11.5  21.3  2 years Red Rock Generating Facility 8.2  8.4  36 years Other Regulatory Assets Approved for Recovery 0.5  0.6  various Total Regulatory Assets Currently Earning a Return 253.7  255.3  Regulatory Assets Currently Not Earning a Return Pension and OPEB Funded Status 52.3  73.4  12 years Unamortized Loss on Reacquired Debt 6.1  6.5  18 years Other Regulatory Assets Approved for Recovery 12.4  5.4  various Total Regulatory Assets Currently Not Earning a Return 70.8  85.3  Total Regulatory Assets Approved for Recovery 324.5  340.6  Total Noncurrent Regulatory Assets $ 375.0  $ 375.2  (a) Northeastern Plant, Unit 3 is approved for recovery through 2040, but expected to retire in 2026. PSO records a regulatory asset for accelerated depreciation. See “Regulated Generating Units to be Retired” section above for additional information. 278