Subsequent Event

12 Months Ended

Dec. 31, 2016

Subsequent Events [Abstract]

Subsequent Event

17. Subsequent Event

On February 7, 2017, the FPSC approved a settlement agreement between PGS and OPC agreeing to new depreciation rates that reduce annual depreciation expense, accelerate the amortization of the regulatory asset associated with environmental remediation costs, include obsolete plastic pipe replacements through the existing cast iron and bare steel replacement rider, and decrease the bottom of the ROE range from 9.75% to 9.25%. See Note 3 for further information on the settlement agreement.