MAJOR CUSTOMERS AND CONCENTRATION OF CREDIT RISK (Tables)

12 Months Ended

Dec. 31, 2019

Accounts receivable | Credit Concentration Risk

Major customers and concentration of credit risk

Schedule of customers as a percentage of consolidated amounts

	December 31,
Customer	2019	2018
Southern Nuclear Operating Company	45%	34%
Tennessee Valley Authority	*	11%
Energy Northwest	*	10%

*Less than 10%

Revenue. | Customer Concentration Risk

Major customers and concentration of credit risk

Schedule of customers as a percentage of consolidated amounts

	Year Ended December 31,
Customer	2019	2018
Southern Nuclear Operating Company	26%	25%
Tennessee Valley Authority	22%	26%
Richmond County Constructors, LLC ("RCC")	14%	18%
Energy Northwest	10%	*
All others	28%	31%
Total	100%	100%

*Less than 10%