Revenues from Contracts with Customers

Most of Registrant's revenues are accounted for under the revenue recognition accounting standard, "Revenue from Contracts with Customers - (Topic 606)." The adoption of this accounting standard effective January 1, 2018 did not have a material impact on Registrant's measurement or timing of revenue recognition.

GSWC provides water and electric utility services to customers as specified by the CPUC. The transaction prices for water and electric revenues are based on tariff rates authorized by the CPUC, which include both quantity-based and flat charges. Tariff revenues represent the adopted revenue requirement authorized by the CPUC intended to provide GSWC with an opportunity to recover its costs and earn a reasonable return on its net capital investment. The annual revenue requirements are comprised of operation and maintenance costs, administrative and general costs, depreciation and taxes in amounts authorized by the CPUC and a return on rate base consistent with the capital structure authorized by the CPUC.

Water and electric revenues are recognized over time as customers simultaneously receive and use the utility services provided. Water and electric revenues include amounts billed to customers on a cyclical basis based on meter readings for services provided. Customer bills also include surcharges for cost-recovery activities, which represent CPUC-authorized balancing and memorandum accounts that allow for the recovery of previously incurred operating costs. Revenues from these surcharges result in no impact to earnings as they are offset by corresponding increases in operating expenses to reflect the recovery of the associated costs. Customer payment terms are approximately 20 business days from the billing date. Unbilled revenues are amounts estimated to be billed for usage since the last meter-reading date to the end of the accounting period. Historical customer usage forms the basis for estimating unbilled revenue.

GSWC bills certain sales and use taxes levied by state or local governments to its customers. Included in these sales and use taxes are franchise fees, which GSWC pays to various municipalities (based on their ordinances) in order to use public rights of way for utility purposes. GSWC bills these franchise fees to its customers based on a CPUC-authorized rate for each ratemaking area as applicable. These franchise fees, which are required to be paid regardless of GSWC’s ability to collect them from its customers, are accounted for on a gross basis. GSWC’s franchise fees billed to customers and recorded as operating revenue were approximately $894,000 and $937,000 for the three months ended June 30, 2018 and 2017, respectively, and $1.7 million and $1.8 million for the six months ended June 30, 2018 and 2017, respectively. When GSWC acts as an agent, and a tax is not required to be remitted if it is not collected from customers, the tax is accounted for on a net basis.

GSWC revenues tracked under the Water Revenue Adjustment Mechanism (“WRAM”) regulatory accounts for its water segment, and the Base Revenue Requirement Adjustment Mechanism ("BRRAM") regulatory account for its electric segment, are alternative revenue programs accounted for under Accounting Standards Codification ("ASC") Topic 980, Regulated Operations.

For ASUS, performance obligations consist of: (i) performing ongoing operation and maintenance of the water and/or wastewater systems and treatment plants for each military base served, and (ii) performing construction activities (including renewal and replacement capital work) on each military base served. The transaction price for each performance obligation is either delineated in, or initially derived from, the applicable 50-year contract and/or any subsequent contract modifications. Depending on the state in which operations are conducted, the Military Utility Privatization Subsidiaries are also subject to certain state non-income tax assessments, which are accounted for on a gross basis and have been immaterial to date.

The ongoing performance of operation and maintenance of the water and/or wastewater systems and treatment plants is viewed as a single performance obligation for each 50-year contract with the U.S. government. Registrant recognizes revenue for operations and maintenance fees monthly using the "right to invoice" practical expedient under ASC Topic 606. ASUS has a right to consideration from the U.S. government in an amount that corresponds directly to the value to the U.S. government of ASUS’s performance completed to date. The contractual operations and maintenance fees are firm-fixed, and the level of effort or resources expended in the performance of the operations-and-maintenance-fees performance obligation is largely consistent over the 50-year term. Therefore, Registrant has determined that the monthly amounts invoiced for operations and maintenance performance are a fair reflection of the value transferred to the U.S. government. Invoices to the U.S. government for operations and maintenance service, as well as construction activities, are due upon receipt.

ASUS's construction activities consist of various projects to be performed. Each of these projects' transaction prices is delineated either in the 50-year contract or through a specific contract modification for each construction project, which includes the transaction price for that project. Each construction project is viewed as a separate, single performance obligation. Therefore, it is generally not necessary to allocate a construction transaction price to more than one construction performance obligation. Revenues for construction activities are recognized over time, with progress toward completion measured based on the input method using costs incurred relative to the total estimated costs (cost-to-cost method). Due to the nature of these construction projects, Registrant has determined cost-to-cost input measurement to be the best method to measure progress towards satisfying its construction contract performance obligations, as compared to using an output measurement such as units produced. Changes in job performance, job site conditions, change orders and/or estimated profitability may result in revisions to costs and income for ASUS, and are recognized in the period in which any such revisions are determined. Pre-contract costs for ASUS, which consist of design and engineering labor costs, are deferred if recovery is probable, and are expensed as incurred if recovery is not probable. Deferred pre-contract costs have been immaterial to date.

Contracted services revenues recognized during the three and six months ended June 30, 2018 from performance obligations satisfied in previous periods were not material.

Although GSWC has a diversified base of residential, commercial, industrial and other customers, revenues derived from residential and commercial customers account for approximately 90% and 85% of total water and electric revenues, respectively.

For the three and six months ended June 30, 2018, disaggregated revenues from contracts with customers by segment are as follows:



(dollar in thousands)	Three Months Ended June 30, 2018			Six Months Ended June 30, 2018
Water:
Tariff-based revenues	$	70,251		$	136,026
CPUC-approved surcharges (cost-recovery activities)	728			1,521
Other	453			895
Water revenues from contracts with customers	71,432			138,442
WRAM under-collection (alternative revenue program)	5,301			2,703
Total water revenues	76,733			141,145

Electric:
Tariff-based revenues	7,795			17,814
CPUC-approved surcharges (cost-recovery activities)	63			110
Electric revenues from contracts with customers	7,858			17,924
BRRAM over-collection (alternative revenue program)	(17		)	(251		)
Total electric revenues	7,841			17,673

Contracted services:
Water	14,233			27,233
Wastewater	8,094			15,578
Contracted services revenues from contracts with customers	22,327			42,811

Total revenues	$	106,901		$	201,629

The opening and closing balances of the receivable from the U.S. government, contract assets and contract liabilities from contracts with customers, which related entirely to ASUS, are as follows:



(dollar in thousands)	June 30, 2018		January 1, 2018

Receivable from the U.S. government	$	56,261	$	40,150
Contract assets	$	16,153	$	30,388
Contract liabilities	$	7,043	$	3,911

As a result of the adoption of ASC Topic 606, amounts previously reported under "Costs and estimated earnings in excess of billings on contracts" are now reflected as either "Receivable from U.S. government" or "Contract assets," depending on whether receipt of these amounts is conditional on something other than the passage of time. Amounts previously reported under "Billings in excess of costs and estimated earnings on contracts" are now reflected as "Contract liabilities."

Contract Assets - Contract assets are those of ASUS and consist of unbilled revenues recognized from work-in-progress construction projects where the right to payment is conditional on something other than the passage of time. The classification of this asset as current or noncurrent is based on the timing of when ASUS expects to bill these amounts.

Contract Liabilities - Contract liabilities are those of ASUS and consist of billings in excess of revenue recognized. The classification of this liability as current or noncurrent is based on the timing of when ASUS expects to recognize revenue.

Revenue for the three and six months ended June 30, 2018 that were included in contract liabilities at the beginning of the period were $2.6 million and $1.9 million, respectively.

As of June 30, 2018, Registrant's aggregate remaining performance obligations, all of which are for the contracted services segment, was $3.1 billion. Registrant expects to recognize revenue on these remaining performance obligations over the remaining terms from each of the 50-year contracts, which range from 36 to 50 years. Each of the contracts with the U.S. government is subject to termination, in whole or in part, prior to the end of its 50-year term for the convenience of the U.S. government.