Black Hills : 2024 EEI ESG Disclosure

About this update from Black Hills Corporation

Power BI Desktop Electric Company ESG/Sustainability Quantitative Information Parent Company: Black Hills Corporation Operating Company: Black Hills Colorado Electric, LLC (d/b/a Black Hills Energy), Black Hills Power, Inc. (d/b/a Black Hills Energy), Cheyenne Light, Fuel and Power Company (d/b/a Black Hills Energy), Black Hills Colorado IPP, LLC, Black Hills Colorado Wind, LLC, Black Hills Electric Generation, LLC, Black Hills Wyoming, LLC Business Type: Vertically Integrated State of Operation: Colorado, South Dakota, Wyoming State with RPS Programs: Colorado Regulatory Environment: Regulated and Non-Regulated Report Date: June 18, 2025 Ref, No. Refer to the 'EEI Definitcions' tab for more information on each metric Baseline 2005 Last Year 2023 Current Year 2024 Comments, Links, Additional Information, and Notes Portfolio 1 1.1 1.2 1.3 1.4 1.5 1.5.1 1.5.2 1.5.3 1.5.4 1.5.5 1.6 Owned Nameplate Generation Capacity at end of year (MW) Coal Natural Gas Nuclear Petroleum Total Renewable Energy Resources Biomass/Biogas Geothermal Hydroelectric Solar Wind Other 623.6 363.0 221.0 0.0 40.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1,394.3 394.6 760.0 0.0 38.0 201.7 0.0 0.0 0.0 0.0 201.7 0.0 1,394.3 394.6 760.0 0.0 38.0 201.7 0.0 0.0 0.0 0.0 201.7 0.0 This includes 100MW capacity of dual fuel Natural Gas and Oil generation. Use the data organizer on the left (i.e., the plus/minus symbol) to open/close the alternative generation reporting options 2.i 2.1.i 2.2.i 2.3.i 2.4.i 2.5.i 2.5.1.i 2.5.2.i 2.5.3.i 2.5.4.i 2.5.5.i 2.6.i 2.ii 2.1.ii 2.2.ii 2.3.ii 2.4.ii 2.5.ii 2.5.1.ii 2.5.2.ii 2.5.3.ii 2.5.4.ii 2.5.5.ii 2.6.ii Owned Net Generation for the data year (MWh) Coal Natural Gas Nuclear Petroleum Total Renewable Energy Resources Biomass/Biogas Geothermal Hydroelectric Solar Wind Other Purchased Net Generation for the data year (MWh) Coal Natural Gas Nuclear Petroleum Total Renewable Energy Resources Biomass/Biogas Geothermal Hydroelectric Solar Wind Other 2,652,147 2,563,767 83,649 0 4,731 0 0 0 0 0 0 0 3,827,200 0 0 0 0 17,205 0 0 17,205 0 0 3,810,002 5,233,603 2,536,490 2,018,974 0 -1,208 679,347 0 0 0 0 679,347 0 2,019,336 162,665 0 0 0 349,154 0 0 21,448 86,284 241,422 1,507,517 5,254,644 2,353,154 2,241,885 0 -924 660,528 0 0 0 0 660,528 0 2,225,119 104,205 0 0 0 1,073,754 0 0 19,921 483,758 570,075 1,047,160 Net generation and emissions adjusted by % equity of jointly owned sources. Includes 49.9% third party ownership of Black Hills Colorado IPP reported as noncontrolling interest. Includes market purchased power and power purchased agreements. Purchased power data excludes intercompany purchases between Black Hills Corporation's Includes market purchases and all other purchased power. Use the data organizer on the left (i.e., the plus/minus symbol) to open/close the alternative generation reporting options 3.0 Capital Expenditures and Energy Efficiency (EE) Total Annual Capital Expenditures (nominal dollars) Incremental Annual Electricity Savings from EE Measures (MWh) Incremental Annual Investment in Electric EE Programs (nominal dollars) Retail Electric Customer Count (at end of year) Commercial Industrial Residential 3.1 Not available $590M $798M 3.2 Not available 19,841 16,793 3.3 Not available $7,569,530 $7,602,140 4.0 4.1 25,745 31,480 32,289 4.2 142 84 83 4.3 165,483 190,776 192,716 Emissions 5 GHG Emissions: Carbon Dioxide (CO2) and Carbon Dioxide Equivalent (CO2e) Note: The alternatives available below are intended to provide flexibility in reporting GHG emissions, and should be used to the extent appropriate for each company. Owned Generation Carbon Dioxide (CO2) Total Owned Generation CO2 Emissions (MT) Total Owned Generation CO2 Emissions Intensity (MT/Net MWh) Carbon Dioxide Equivalent (CO2e) Total Owned Generation CO2e Emissions (MT) Total Owned Generation CO2e Emissions Intensity (MT/Net MWh) Purchased Power Carbon Dioxide (CO2) Total Purchased Generation CO2 Emissions (MT) Total Purchased Generation CO2 Emissions Intensity (MT/Net MWh) Carbon Dioxide Equivalent (CO2e) Total Purchased Generation CO2e Emissions (MT) Total Purchased Generation CO2e Emissions Intensity (MT/Net MWh) Owned Generation + Purchased Power Carbon Dioxide (CO2) Total Owned + Purchased Generation CO2 Emissions (MT) Total Owned + Purchased Generation CO2 Emissions Intensity (MT/Net MWh) Carbon Dioxide Equivalent (CO2e) Total Owned + Purchased Generation CO2e Emissions (MT) Total Owned + Purchased Generation CO2e Emissions Intensity (MT/Net MWh) Non-Generation CO2e Emissions of Sulfur Hexafluoride (SF6) Total CO2e emissions of SF6 (MT) Leak rate of CO2e emissions of SF6 (MT/Net MWh) Nitrogen Oxide (NOx), Sulfur Dioxide (SO2), Mercury (Hg) Nitrogen Oxide (NOx) Total NOx Emissions (MT) Total NOx Emissions Intensity (MT/Net MWh) Sulfur Dioxide (SO2) Total SO2 Emissions (MT) Total SO2 Emissions Intensity (MT/Net MWh) Mercury (Hg) Total Hg Emissions (kg) Total Hg Emissions Intensity (kg/Net MWh) Global warming potentials for historic data are updated to reflect 2024 calendar year EPA GHG Reporting Program methodologies. Customers calculating Scope 2 emissions should use the residual intensity published in EEI's " Electric Compan y Carbon Emissions and Electrici ty Mix Reportin g Database ". Facilities that do not trip the EPA reporting threshold for SF6 emissions have been estimated. 5.1 5.1.1 5.1.1.1 3,264,707 4,071,461 3,953,507 5.1.1.2 1.23 0.78 0.75 5.1.2 5.1.2.1 3,289,952 4,096,242 3,976,600 5.1.2.2 1.24 0.78 0.76 5.2 5.2.1 5.2.1.1 3,137,519 903,728 586,051 5.2.1.2 0.82 0.44 0.26 5.2.2 5.2.2.1 3,151,924 909,655 589,844 5.2.2.2 0.82 0.45 0.27 5.3 5.3.1 5.3.1.1 6,402,226 4,975,189 4,539,558 5.3.1.2 0.99 0.69 0.61 5.3.2 5.3.2.1 6,441,876 5,005,897 4,566,444 5.3.2.2 0.99 0.69 0.61 5.4 5.4.1 Not applicable 3,398 2,533 5.4.2 Not applicable 0.0006650 0.000482 6 Total 6.2 6.2.1 5,045 1,880 1,891 6.2.2 0.001902 0.000359 0.00036 6.3 6.3.1 8,017 1,147 1,234 6.3.2 0.003022 0.000219 0.000235 6.4 6.4.1 90.44 8.1 9.1 6.4.2 0.0000341 0.0000015 0.000002 Use the data organizer on the left (i.e., the plus/minus symbol) to open/close the alternative generation reporting options Resources 7 Human Resources Total Number of Employees Percentage of Women in Total Workforce Percentage of Minorities in Total Workforce Total Number on Board of Directors/Trustees Percentage of Women on Board of Directors/Trustees Percentage of Minorities on Board of Directors/Trustees Employee Safety Metrics Recordable Incident Rate Lost-time Case Rate Days Away, Restricted, and Transfer (DART) Rate Work-related Fatalities Fresh Water Resources used in Thermal Power Generation Activities Water Withdrawals - Consumptive (Millions of Gallons) Water Withdrawals - Non-Consumptive (Millions of Gallons) Water Withdrawals - Consumptive Rate (Millions of Gallons/Net MWh) Water Withdrawals - Non-Consumptive Rate (Millions of Gallons/Net MWh) Waste Products Amount of Hazardous Waste Manifested for Disposal (MT) Percent of Coal Combustion Products Beneficially Used 7.1 843 2,874 2,841 7.2 27% 24% 24% 7.3 9% 15% 15% 7.4 10 10 10 7.5 10% 30% 30% 7.6 10% 10% 10% 7.7 7.7.1 3.99% 1.51% 1.83% 7.7.2 0.39% 0.38% 0.65% 7.7.3 1.93% 0.65% 1.00% 7.7.4 - 0 0 8 8.1 Not available 758.92 1,022.61 2W0a2ter withdrawal ba4sed on facilities wWeaostpeerRaetep.ort 8.2 Not available 0.00 0.00 8.3 Not available 1.40E-04 1.91E-04 2In0t2ensity based on g4eneration from foWssailsftueeRl eapnodrrtenewable facilities we operate. 8.4 Not available 0.00 0.00 9 9.1 Not available 58.2 49.4 All Facilities are classified by the EPA as Very Small Quantity Generators (VSQGs) - due to low quantities of HW generation, however this value has been quantified 9.2 Not available 0% 0% and reported. This total does not include universal waste, please see our Sustainability Report for complete waste listing.  All information and data in the EEI and AGA ESG qualitative and quantitative reports are provided on a voluntary basis and could be subject to change. These reports contain forward-looking information as defined by the Securities and Exchange Commission. Whether actual results and developments will conform to our expectations and predictions is subject to a number of risks and uncertainties that, among other things, could cause actual results to differ materially from those contained in the forward-looking statements, including without limitation, the risk factors described in our 2024 Annual Report on Form 10-K. We assume no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events or otherwise. © 2021 Edison Electric Institute. All rights reserved.

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