Benefits

$6.99 billion in gross benefits since Nov 2014 (as of 04/30/25)

(millions $)
WEIM Participants 2014-2019 2020 2021 2022 2023 2024 2025 Total
Q1
Arizona Public ServiceEntered 10/2016 $140.32 $48.96 $58.79 $88.84 $69.41 $29.04 $4.10 $439.10
AvangridEntered 04/2023 $20.22 $37.45 $11.22 $68.89
Avista UtilitiesEntered 04/2022 $24.08 $20.85 $16.56 $2.50 $63.99
BANCEntered 04/2019 $15.86 $30.36 $129.61 $281.65 $157.64 $177.45 $28.76 $821.33
BPAEntered 05/2022 $26.39 $35.38 $36.36 $8.06 $106.17
*California ISOEntered 11/2014 $191.88 $62.04 $146.00 $289.83 $198.61 $113.65 $21.96 $1,023.97
EPEEntered 04/2023 $13 $18.33 $3.22 $34.55
Idaho Power CompanyEntered 04/2018 $55.11 $26.30 $52.62 $43.95 $62.92 $40.07 $10.31 $291.28
LADWPEntered 04/2021 $42.71 $75.09 $148.96 $140.78 $17.46 $425
NV EnergyEntered 12/2015 $89.03 $24.62 $47.76 $117.75 $176.11 $207.07 $81.71 $744.05
NorthWestern EnergyEntered 06/2021 $12.09 $31.22 $30.95 $46.36 $13.69 $134.31
PacifiCorpEntered 11/2014 235.29 $40.63 $115.46 $200.02 $154.26 $192.42 $50.15 $988.23
Portland General ElectricEntered 10/2017 $73.27 $31.76 $30.78 $61.26 $64.01 $51.56 $11.29 $323.93
PowerexEntered 04/2018 $19.78 $4.03 $3.08 $12.41 $178.57 $50.37 $7.90 $276.14
PNMEntered 04/2021 $12.53 $34.59 $44.39 $56.83 $22.53 $170.87
Puget Sound EnergyEntered 10/2016 $41.25 $13.68 $20.67 $31.15 $46.97 $60.99 $11.26 $225.97
Salt River ProjectEntered 04/2020 36.06 $47.90 $77.08 $95.34 $68.48 $11.19 $336.05
Seattle City LightEntered 04/2020 $6.64 $13.92 $14.88 $17.6 $46.2 $23.22 $122.46
Tacoma PowerEntered 04/2022 $9.61 $22.40 $26.53 $3.17 $61.71
TEPEntered 05/2022 $40.93 $28.87 $31.2 $3.96 $104.96
TIDEntered 04/2021 $5.11 $10.82 $6.79 $5.22 $1.10 $29.04
WALCEntered 04/2023 $59.35 $117.57 $20.60 $197.52
Total $861.79 $325.08 $739.03 $1471.55 $1652.6 $1570.49 $369.36 $6,989.88

*The California ISO is the balancing authority and not a market participant, with benefits estimated for the California ISO balancing authority area accruing to its market participants and not the California ISO Corporation. 

Quarterly benefits

These reports quantify the estimated gross benefits from Western Energy Imbalance Market (WEIM) operations.