Facility Name:Wygen III
Facility Identifier:
Facility Reporting Year:2020
Facility Location:
Address: 20 WYODAK ROAD
City: GILLETTE
State: WY
Postal Code: 82718

Facility Site Details:
CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):924,747
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:2020-01-01
GHG Report End Date:2020-12-31
Description of Changes to Calculation Methodology:
Plant Code Indicator:Y
Primary NAICS Code:221112
Second Primary NAICS Code:

Parent Company Details:
Parent Company Name:BLACK HILLS CORP
Address:7001 Mount Rushmore Road, Rapid City,  SD 57702
Percent Ownership Interest:52
Parent Company Name:MONTANA DAKOTA UTILITIES CO
Address:1200 W. Century Ave, Bismarck,  ND 58506
Percent Ownership Interest:25
Parent Company Name:CONSOLIDATED WY MUNICIPALITIES ELECTRIC POWER SYSTEM
Address:201 E. 5th Street, Gillette,  WY 82717
Percent Ownership Interest:23

Subpart D: Electricity Generation

Gas Information Details

Gas NameCarbon Dioxide
Gas Quantity919,895.5 (Metric Tons)
Own Result?

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

Gas NameMethane
Gas Quantity9.67 (Metric Tons)
Own Result?

Gas NameNitrous Oxide
Gas Quantity15.469 (Metric Tons)
Own Result?

Unit Details:

Unit Name : 001
Unit Type : Electricity Generator
Unit Description :
Plant Code : 56596 (numeric, maximum of 6 digits)
Part 75 Methodology : CEMS
Methodology Start Date: 2010-05-03
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 919895.5
Annual CO2 Emissions Including Biomass (short tons): 1014000.9
Annual CO2 Emissions from Biomass (metric tons): 0

CEMS Details:
Operating Hours CO2 Concentration Substituted: 233
Operating Hours Stack Gas Flow Rate Substituted: 5
Operating Hours Stack Gas Moisture Substituted:

Electricity Fuel Details:
Fuel type: Subbituminous
Annual heat input:  9668216 (mmBtu)
CH4 Emissions CO2 Equivalent:  241.7  (Metric Tons)
N2O Emissions CO2 Equivalent:  4609.8  (Metric Tons)