Changes in plan assets and benefit obligations recognized in regulatory assets, for the year
ended December 31, 2019, were as follows:
(in thousands) DB Plan OPEB Plans
Regulatory asset balance, beginning of period $ 7,632 S 565
Net actuarial gain incurred during the period 2,991 516
Prior service cost incurred during the period - 16
Recognized net actuarial (gain)/loss (354) (19)
Regulatory asset balance, end of period S 10,269 S 1,078
Amounts recognized in regulatory assets for the DB and OPEB Plans that have not yet been
recognized as components of net periodic benefit cost of the following as of December 31,
2020:
(in thousands) DB Plan OPEB Plans
Net actuarial loss S 12,525 S 1,787
Prior service cost - (11S)
Regulatory asset 5 12,525 S 1,672
Amounts recognized in regulatory assets for the DB and OPEB Plans that have not yet been
recognized as components of net periodic benefit cost of the following as of December 31,
2019:
(in thousands) DB Plan OPEB Plans
Net actuarial loss S 10,269 S 1,209
Prior service cost - (131)
Regulatory asset S 10,269 S 1,078
The key assumptions used to value benefit obligations and calculate net periodic benefit cost
for our DB and OPEB Plans include the following:
2020 2019
Discount rate for net periodic benefit cost, beginning of year 3.13% 4.15%
Discount rate for benefit obligations, end of year fa) 2.39% 3.13%
Expected return on plan assets for the period (net of investment expenses) 7.00% 7.00%
Rate of compensation increase, beginning of year 3.00% 3.00%
Healthcare cost trend rate (applicable only to OPEB Plans) 6.00% 6.50%
®) an increase or decrease in the discount rate of 0.5% would result ina change in the funded status as of December
31, 2020, for the DB Plan and the OPEB Plans of approximately $3.4 million and $544 thousand, respectively.
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