Summary of Significant Accounting Policies (Tables) - GSWC

12 Months Ended

Dec. 31, 2017

Summary of significant accounting policies

Schedule of estimated useful lives of utility plant, as authorized by the CPUC

Estimated useful lives of GSWC’s utility plant, as authorized by the CPUC, are as follows:

Source of water supply	30 years to 50 years
Pumping	25 years to 40 years
Water treatment	20 years to 35 years
Transmission and distribution	25 years to 55 years
Generation	40 years
Other plant	7 years to 40 years

Schedule of estimates of the fair value of long-term debt

The table below estimates the fair value of long-term debt issued by GSWC. Rates available to GSWC at December 31, 2017 and 2016 for debt with similar terms and remaining maturities were used to estimate fair value for long-term debt. Changes in the assumptions will produce differing results.

	2017				2016
(dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt—GSWC (1)	$	325,265	$	424,042	$	325,582	$	423,124

Schedule of long-term debt measured at fair value

The following table sets forth by level, within the fair value hierarchy, GSWC’s long-term debt measured at fair value as of December 31, 2017:

(dollars in thousands)	Level 1	Level 2		Level 3	Total
Long-term debt—GSWC	—	$	424,042	—	$	424,042