Facility Name:Four Corners Steam Elec Station
Facility Identifier:
Facility Reporting Year:2023
Facility Location:
Address: END OF COUNTY RD 6675
City: FRUITLAND
State: NM
Postal Code: 87416

Facility Site Details:
CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):7,185,334
CO2 equivalent emissions from supplier subparts LL-QQ (metric tons):
Biogenic CO2 emissions from facility subparts C-II, SS, and TT (metric tons):0
Cogeneration Unit Emissions Indicator:N
GHG Report Start Date:2023-01-01
GHG Report End Date:2023-12-31
Description of Changes to Calculation Methodology:
Plant Code Indicator:Y
Primary NAICS Code:221112
Second Primary NAICS Code:

Parent Company Details:
Parent Company Name:SALT RIVER PROJECT AGRICULTURAL IMPROVEMENT & POWER DISTRICT
Address:1500 N Mill Avenue, Tempe,  AZ 85281
Percent Ownership Interest:10
Parent Company Name:PNM RESOURCES INC
Address:414 Silver Avenue Sw, Albuquerque,  NM 87102
Percent Ownership Interest:13
Parent Company Name:THE NAVAJO NATION TRIBAL GOVERNMENT
Address:2 Miles N Of Hwy 264, Window Rock,  NM 86515
Percent Ownership Interest:7
Parent Company Name:PINNACLE WEST CAPITAL CORP
Address:400 N. 5Th Street, Phoenix,  AZ 85004
Percent Ownership Interest:63
Parent Company Name:UNS ENERGY CORP
Address:88 East Broadway Blvd., Tucson,  AZ 85701
Percent Ownership Interest:7

Subpart C: General Stationary Fuel Combustion

Gas Information Details

Gas NameCarbon Dioxide
Gas Quantity3,821.3 (Metric Tons)
Own Result?

Gas NameBiogenic Carbon dioxide
Gas Quantity0 (Metric Tons)
Own Result?

Gas NameMethane
Gas Quantity0.07 (Metric Tons)
Own Result?

Gas NameNitrous Oxide
Gas Quantity0.007 (Metric Tons)
Own Result?

Unit Details:
Unit Name : AUX-01
Unit Type : OB (Boiler, other)
Unit Description :
Individual Unit Details:
Use Ivt Indicator: N
Maximum Rated Heat Input Capacity: 219.73 (mmBtu/hr)

Emission Details:
Annual CO2 mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)

Tier Fuel Details:
Fuel : Natural Gas (Weighted U.S. Average)
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2023-01-01
Tier Methodology End Date : 2023-12-31

Fuel Emission Details :
Total CO2 emissionsTotal CH4 emissionsTotal N2O emissionsTotal CH4 emissions CO2eTotal N2O emissions CO2e
3821.3 (Metric Tons) 0.07 (Metric Tons) 0.007 (Metric Tons) 1.8 (Metric Tons) 2.1 (Metric Tons)

Equation C5/C8 Inputs :
Fuel Quantity : 70312180 (scf/year)
Carbon Content : 0.733525 (kg C per kg)
Molecular Weight : 16.905 (kg/kg-mole)
Use Default High Heat Value : false
High Heat Value : 0.001024 (mmBtu/scf)

Carbon Content Substitute Data Information :
Total number of valid carbon content determinations : 2
Total number of carbon content substitute data values : 0
Frequency of carbon content determinations : Semiannually
Total number of operating hours in the reporting year for which missing data substitution was used for fuel usage : 0

Molecular Weight Information :
Total number of valid molecular weight determinations : 2
Total number of molecular weight substitute data values : 0
Frequency of molecular weight determinations : Semiannually
Molar Volume Constant (MVC) used : 836.6 (scf/kg-mole)


Subpart D: Electricity Generation

Gas Information Details

Gas NameCarbon Dioxide
Gas Quantity7,123,968 (Metric Tons)
Own Result?

Gas NameBiogenic Carbon dioxide
Gas Quantity0 (Metric Tons)
Own Result?

Gas NameMethane
Gas Quantity841.91 (Metric Tons)
Own Result?

Gas NameNitrous Oxide
Gas Quantity122.46 (Metric Tons)
Own Result?

Unit Details:

Unit Name : 4
Unit Type : Electricity Generator
Unit Description :
Plant Code : 2442 (numeric, maximum of 6 digits)
Part 75 Methodology : CEMS
Methodology Start Date: 1995-01-01
Methodology End Date: 2023-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 3563012.9
Annual CO2 Emissions Including Biomass (short tons): 3927509.1
Annual CO2 Emissions from Biomass (metric tons): 0

CEMS Details:
Operating Hours CO2 Concentration Substituted: 8
Operating Hours Stack Gas Flow Rate Substituted: 0
Operating Hours Stack Gas Moisture Substituted:

Electricity Fuel Details:
Fuel type: Subbituminous
Annual heat input:  38279806.732 (mmBtu)
CH4 Emissions CO2 Equivalent:  10526.9  (Metric Tons)
N2O Emissions CO2 Equivalent:  18251.8  (Metric Tons)


Unit Name : 5
Unit Type : Electricity Generator
Unit Description :
Plant Code : 2442 (numeric, maximum of 6 digits)
Part 75 Methodology : CEMS
Methodology Start Date: 1995-01-01
Methodology End Date: 2023-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 3560955.1
Annual CO2 Emissions Including Biomass (short tons): 3925240.8
Annual CO2 Emissions from Biomass (metric tons): 0

CEMS Details:
Operating Hours CO2 Concentration Substituted: 16
Operating Hours Stack Gas Flow Rate Substituted: 36
Operating Hours Stack Gas Moisture Substituted:

Electricity Fuel Details:
Fuel type: Subbituminous
Annual heat input:  38257694.065 (mmBtu)
CH4 Emissions CO2 Equivalent:  10520.9  (Metric Tons)
N2O Emissions CO2 Equivalent:  18241.3  (Metric Tons)