exhibit 10. 01 arizona nuclear power project participation agreement dated august 23, 1973 among arizona public service company salt river project agricultural improvement and power district tucson gas and electric company public service company of new mexico and el paso electric company arizona nuclear power project participation agreement table of contents section no. caption page 1. parties 12. agreement 13. definitions 1 3. 1accounting practice 1 3. 2administrative committee 1 3. 3anpp 1 3. 4anpp high voltage switchyard ( s ) 1 3. 5arizona nuclear power project 1 3. 6auditing committee 1 3. 7available generating capability 1 3. 8base load period 1 3. 9capacity 1 3. 10capital improvements 2 3. 11construction account 2 3. 12construction agreement 2 3. 13construction costs 2 3. 14construction funds 2 3. 15construction insurance 2 3. 16construction schedule 2 3. 17construction work 2 3. 18date of firm operation 2 3. 19emergency spare parts 2 3. 20engineering and operating committee 2 3. 21energy 2 3. 22final completion report 2 3. 23fpc accounts 2 3. 24fuel assemble 3 3. 25fuel expense 3 3. 26fuel lessor 3 3. 27general service requirements 3 3. 28generation entitlement share 3 3. 29generating unit 3 3. 30materials and supplies 3 3. 31maximum generating capacity 3 section no. caption page 1. parties 12. agreement 13. definitions 1 3. 1accounting practice 1 3. 2administrative committee 1 3. 3anpp 1 3. 4anpp high voltage switchyard ( s ) 1 3. 5arizona nuclear power project 1 3. 6auditing committee 1 3. 7available generating capability 1 3. 8base load period 1 3. 9capacity 1 3. 10capital improvements 2 3. 11construction account 2 3. 12construction agreement 2 3. 13construction costs 2 3. 14construction funds 2 3. 15construction insurance 2 3. 16construction schedule 2 3. 17construction work 2 3. 18date of firm operation 2