Facility _Information facility _id utility

_code legal_owner_nam e

legl_operator_name

legal_address_ty pe

legal_address

legal_city legal_state legal_zip 7504 19545 Black Hills Power, Inc Black Hills Power, Inc

operator P O Box 1400 Rapid City SD 57709-1400 55479 19545 Black Hills W yo mi ng, Inc Black Hills Power, Inc

operator P O Box 1400 Rapid City SD 57709-1400 56319 3461 Cheyenne Light, Fuel & Power Black Hills Power, Inc

operator P O Box 1400 Rapid City SD 57709-1400 Page 1Facility _Information plant_nam e

physical_address

phyical_city

physical_state

physical_zip

ma iling_address

ma iling_city

ma iling_state

ma iling_zip Neil Sim pson II

13151 Hwy

51 Gillette WY 82716 13151 Hwy 51 Gillette WY 82716 Wygen 1 13151 Hwy 51 Gillette WY 82718 13151 Hwy 51 Gillette WY 82718 Wygen 2 20 W yo dak Road Gillette WY 72718 20 W yo dak Road Gillette WY 72718 Page 2Facility _Information RFA_small_entity

ff_fired_coal

ff_fired_oil ff_fired_ngas ff_fired_petcoke

ff_fired_other

ff_permitted_coal

ff_permitted_oil

ff_permitted_ngas Don't Know TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE Don't Know TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE Don't Know TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE Page 3Facility _Information ff_permitted_petcoke

ff_permitted_other

deviation_reporting

continuous_emissions

cem_provided

facility _note FALSE FALSE There is not steam reheat cycle on this design. FALSE FALSE No steam reheat on this design. FALSE FALSE WYGEN II began operation in 1/2008. 3 years of history is not available. Page 4Facility _Information There is not steam reheat cycle on this design. WYGEN II began operation in 1/2008. 3 years of history is not available. Page 5facility _contacts facility _id contact_id contact_title contact_name

contact_phone1

contact_phone2

contact_email

contact_primary 7504 1 Environm ental Systems Manager Tim Mordhorst

6057212181 tim .mordhorst@blackhillscorp.com TRUE 55479 2 Envirom ental Systems Manager Tim Mordhorst

6057212181 tim .mordhorst@blackhillscorp.com TRUE 56319 3 Environm ental Systems Manager Tim Mordhorst

6057212181 tim .mordhorst@blackhillscorp.com TRUE Page 6facility _coal_utilized facility _id coal_type percentage_mass percentage_btu

synfuel_type

coal_note 7504 subbituminous 100 100 55479 subbituminous 100 100 56319 subbituminous 100 100 Page 7facility _oil_utilized facility _id oil_ty pe percentage_volume percentage_btu

other_type Page 8facility _other_materials facility _id other_material

permitted_burn

actually _burn other_quantity

other_quantity

_units other_note rcra_utilize rcra_explain Page 9facility _other_materials rcra_explain Page 10boiler_information

facility _id boiler_id boiler_ty pe boiler_other bottom_design

design_fuel heat_input ma x_heat_input MW e_capacity 7504 2 Wa ll firing - front firing Dry Bottom coal 1300 1100 88 55479 3 Wa ll firing - front firing Dry Bottom coal 1300 1053 91 56319 0001 Wa ll firing - front firing Dry Bottom coal 1300 1300 96 Page 11boiler_information

MW e_net_capacity

design_gross_efficiency

operating_gross_efficiency

design_pressure

operating_pressure

design_temp

operating_temp

design_reheat_multiple

design_reheat_temp1 80 33 30 1620 1550 1005 970 FALSE 0 83 33 30 1620 1550 1005 970 FALSE 0 89 33 30 1620 1602 1005 970 FALSE 0 Page 12boiler_information

design_reheat_temp2

operating_reheat_multiple

operating_reheat_temp1

operating_reheat_temp2

hours_operated

vg_capacity

_factor applicable_NSPS

retirement_year

retirement_year_CBI FALSE 0 8650 100 Subpart Da(1) FALSE FALSE 0 8575 100 Subpart Da(1) FALSE FALSE 0 8700 97.4 Subpart Da(2) FALSE Page 13boiler_information

NOx_control

SO2_control

combustion_additives Yes Yes No Yes Yes No Yes Yes No Page 14boiler_fuels

facility _id boiler_id fuel_type fuel_year percentage_massvol percentage_btu

other_type 7504 2 coal - subbituminous 2007 100 100 7504 2 coal - subbituminous 2008 100 100 7504 2 coal - subbituminous 2009 100 100 55479 3 coal - subbituminous 2007 100 100 55479 3 coal - subbituminous 2008 100 100 55479 3 coal - subbituminous 2009 100 100 56319 0001 coal - subbituminous 2007 100 100 56319 0001 coal - subbituminous 2008 100 100 56319 0001 coal - subbituminous 2009 100 100

Page 15boiler_control_NOx

facility _id boiler_id NOx_ty pe NOx_other NOx_online 7504 2 Low NOx Burner 9/1/1995 7504 2 Overfire Air 9/1/1995 55479 3 Low NOx Burner 5/1/2003 55479 3 Overfire Air 5/1/2003 56319 0001 Low NOx Burner 1/1/2008 56319 0001 Overfire Air 1/1/2008 Page 16boiler_control_SO2

facility _id boiler_id SO2_type SO2_other SO2_online 7504 2 Low Sulfur Coal 9/1/1995 55479 3 Low Sulfur Coal 5/1/2003 56319 0001 Low Sulfur Coal 1/1/2008 Page 17boiler_additives

facility _id boiler_id boiler_additive additive_other

additive_online Page 18facility _units facility _id unit_id 7504 001 55479 001 56319 001 Page 19unit_boilers

facility _id unit_id boiler_id 7504 001 2 55479 001 3 56319 001 0001 Page 20facility _controls facility _id control_id control_group control_type

control_other

legacy _control cntrol_online

control_offline

NOx_reagent 7504 PCP1 PM control Electrostatic precipitator, cold side, w/o flue gas conditioning FALSE 9/1/1995 7504 SCB1 SO2 control Circulating Dry

Scrubber FALSE 9/1/1995 55479 BGH1 PM control Fabric Filter, pulse FALSE 4/1/2003 55479 SCR1 NOx control Selective Cataly

tic Reduction FALSE 4/1/2003 Am mo nia 55479 SDA1 SO2 control Spray dryer type FALSE 4/1/2003 56319 BGH1 PM control Fabric Filter, pulse FALSE 1/1/2008 56319 SCR1 NOx control Selective Cataly

tic Reduction FALSE 1/1/2008 Am mo nia 56319 SDA1 SO2 control Spray dryer type FALSE 1/1/2008

Page 21facility _controls reagent_other

NOx_ammonia

SO2_sorbent

oher_sorbent

SO2_scrubber_additive Lim e and alkaline fly

ash No 100 Lim e and alkaline fly ash No 100 Lim e and alkaline fly ash No Page 22facility _sampling_ports facility _id sampling_port_id 7504 SP 55479 SP 56319 SP Page 23facility _stacks facility _id stack_id stack_height stack_diameter

sack_gas_velocity 7504 Stk1 295 9.25 55479 STK1 295 9.25 56319 STK1 495 10.25 Page 24configurations

facility _id configuration_id 7504 NS2Cfg 55479 WYG1Cfg 56319 WYG2Cfg Page 25configuration_components

facility _id configuration_id

component_id

order component_ty pe port_near 7504 NS2Cfg 001 1 Unit 7504 NS2Cfg PCP1 3 PM control 7504 NS2Cfg SCB1 2 SO2 control 7504 NS2Cfg SP 4 Sam pling Port next 7504 NS2Cfg Stk1 5 Stack 55479 WYG1Cfg 001 1 Unit 55479 WYG1Cfg BGH1 4 PM control 55479 WYG1Cfg SCR1 2 NOx control 55479 WYG1Cfg SDA1 3 SO2 control 55479 WYG1Cfg SP 5 Sam pling Port next 55479 WYG1Cfg STK1 6 Stack 56319 WYG2Cfg 001 1 Unit 56319 WYG2Cfg BGH1 4 PM control 56319 WYG2Cfg SCR1 2 NOx control 56319 WYG2Cfg SDA1 3 SO2 control 56319 WYG2Cfg SP 5 Sam pling Port next 56319 WYG2Cfg STK1 6 Stack Page 26configuration_pollutants1

facility _id configuration_id

pollutant_nam e

permit_ty pe_1

em lim it_1 em lim it_units_1 avg_period_1

em lim it_2 em lim it_units_2 7504 NS2Cfg PM (Filterable) Fderal - Title V Operating Permit

0.02 pound per million British Thermal Unit (lb/MMBtu)

1 hour 20 pound per hour (lb/hr) 7504 NS2Cfg Nitrogen Oxide (NOx) Federal - Title V Operating Permit

0.23 pound per million British Thermal Unit (lb/MMBtu)

30 days 299 pound per hour (lb/hr) 7504 NS2Cfg Sulfur Dioxide (SO2) Federal - Title V Operating Permit

0.17 pound per million British Thermal Unit (lb/MMBtu)

30 days 0.2 pound per million British Thermal Unit (lb/MMBtu) 55479 WYG1Cfg Sulfur Dioxide (SO2) Federal - Title V Operating Permit

0.17 pound per million British Thermal Unit (lb/MMBtu)

30 days 172.4 pound per hour (lb/hr) 55479 WYG1Cfg Nitrogen Oxide (NOx) Federal - Title V Operating Permit

0.0016 pound per Gigawatt hour (lb/GW h)

30 days 55479 WYG1Cfg PM (Filterable) Fderal - Title V Operating Permit

0.02 pound per million British Thermal Unit (lb/MMBtu)

3 hours 56319 WYG2Cfg PM (Filterable) State - State Operating Permit

0.012 pound per million British Thermal Unit (lb/MMBtu)

3 hours 56319 WYG2Cfg Sulfur Dioxide (SO2) State - State Operating Permit

0.1 pound per million British Thermal Unit (lb/MMBtu)

30 days 15.6 pound per hour (lb/hr) 56319 WYG2Cfg Nitrogen Oxide (NOx) State - State Operating Permit

0.07 pound per million British Thermal Unit (lb/MMBtu)

30 days 91 pound per hour (lb/hr) 56319 WYG2Cfg Carbon Monoxide (CO) State - State Operating Permit

0.015 pound per million British Thermal Unit (lb/MMBtu)

3 hours 195 pound per hour (lb/hr) 56319 WYG2Cfg VOCs State - State Operating Permit 0.01 pound per million British Thermal Unit (lb/MMBtu)

3 hours 13 pound per hour (lb/hr) 56319 WYG2Cfg Total Mercury (Hgt) State - State Operating Permit

9.7E-08 pound per Gigawatt hour (lb/GW h)

30 days Page 27configuration_pollutants1

avg_period_2

em lim it_3 em lim it_units_3 avg_period_3

em lim it_4 em lim it_units_4 avg_period_4

em lim it_details

test_method 1 hour 30 days 3 hours 30 days 0.2 pound per million British Thermal Unit (lb/MMBtu) 3 hours 5 5 3 hours 0.0014 pound per Gigawatt hour (lb/GW h) 30 days 30 days 0.001 pound per Gigawatt hour (lb/GW h) 30 days 3 hours 3 hours Page 28configuration_pollutants1

em rate em rate_units guarantee_level

_explain

req_monitoring

eq_recordkeeping

req_reporting 0.02 pound per million British Thermal Unit (lb/MMBtu)

No annual stack test Yes Annual 0.23 pound per million British Thermal Unit (lb/MMBtu)

No CEMS Yes Qtr 0.17 pound per million British Thermal Unit (lb/MMBtu)

No CEMS Yes Qtr 0.17 pound per million British Thermal Unit (lb/MMBtu)

No CEM hourly Qtr 0.0016 pound per Gigawatt hour (lb/GW h)

No CEM hourly Qtr 0.02 pound per million British Thermal Unit (lb/MMBtu)

No COM Annual stack test annual 0.012 pound per million British Thermal Unit (lb/MMBtu)

No COMs 6m in qtr 0.1 pound per million British Thermal Unit (lb/MMBtu)

No CEMS hourly qtr 0.07 pound per million British Thermal Unit (lb/MMBtu)

No CEMS hourly qtr 0.15 pound per million British Thermal Unit (lb/MMBtu)

No No No No 0.01 pound per million British Thermal Unit (lb/MMBtu)

No No No No 9.7E-08 pound per Gigawatt hour (lb/GW h)

No CEMS hourly qtr Page 29control_technologies

facility _id configuration_id

component_id

control_id project_title project_ty pe vendor_name

vndor_contact

vendor_phone Page 30control_technologies

vendor_address

vndor_city

vendor_state

vendor_zip actual_start_date projected_start_date

end_date sorbent chemical_additive Page 31control_technologies

injection_point

HAP_em ission_reduction

HAP_em ission_rate

HAP_em ission_rate_units

HAP_achieved_reduction

HAP_achieved_rate

HAP_achieved_rate_units

feed_rate feed_rate_units Page 32control_technologies feed_rate_units Page 33control_coal_ranks

facility _id configuration_id

component_id

control_id coal_type

Page 34control_pollutants1

facility _id configuration_id

component_id

control_id pollutant_nam e

Page 35control_costs

facility _id configuration_id

component_id

control_id boiler_retrofit boiler_new_install

total_capital_investm ent

total_operating_costs

base_year Page 36control_costs

CBI Page 37mi sc_controls

facility _id mi sc_control_id

control_description Page 38mi sc_control_configurations

facility _id mi sc_control_id

configuration_id Page 39fuel_shipments

facility _id shipment_id

shipment_date

am ount_received

am ount_units

fuel_type state_country other_country

county Page 40fuel_shipments

coal_seam shipment_method Page 41fuel_shipment_configurations

facility _id shipment_id

configuration_id Page 42fuel_shipment_samples

facility _id shipment_id

sample_id am ount_fuel am ount_fuel_units

total_sulfur ash_content heating_value

hating_units Page 43fuel_shipment_samples

chlorine chlorine_units fluorine fluorine_units data_provided

data_other_specified

supplier_ty pe

supplier_name

supplier_address Page 44fuel_shipment_samples

supplier_city

supplier_state

supplier_zip

lab_nam e lab_address lab_city lab_state lab_zip analysis_copies Page 45fuel_shipment_samples analysis_copies Page 46fuel_sample_pollutants

facility _id shipment_id

sample_id fuel_pollutant pollutant_conc

pollutant_conc_units

pollutant_conc_ND

pollutant_conc_MDL Page 47test_reports

facility _id report_id report_type other_type report_description report_begin_date

report_end_date

before_control

during_deviation Page 48test_reports

deviation_reports Page 49test_report_configurations

facility _id report_id configuration_id Page 50test_report_fuels

facility _id report_id fuel_id Page 51test_report_fuel_ty pes

facility _id report_id fuel_id fuel_type percentage_massvol percentage_btu

other_type Page 52cem_data

facility _id tim e_period

cem_period_description Page 53cem_data_pollutants1

facility _id tim e_period

pollutant_nam e Page 54test_report_sampling

facility _id report_id sampling_port_id point_differ point_description befre_SO2_device

point_orientation

normal_by pass_percent

testing_by pass_percent Page 55test_report_sampling

fg_fraction Page 56sampling_runs

facility _id report_id sampling_port_id run_id start_datetime end_datetim e

unit_load net_generation fg_moisture_content Page 57sampling_runs

fg_flow_rate

fg_flow_rate_units

standard_temperature

standard_pressure

normal_temperature

normal_pressure

fg_oxygen_content

fg_CO2_content

fg_temperature Page 58sampling_runs

fg_pressure

Hg_loi test_method run_comments

fuel_id fuel_unit_load fuel_flow_rate

fuel_ash fuel_heating_value Page 59sampling_runs

fuel_sulfur Page 60sampling_run_pollutants1

facility _id report_id sampling_port_id run_id pollutant_nam e conc conc_units conc_ND conc_MDL Page 61sampling_run_pollutants1

em ission_rate

em ission_rate_units

em ission_rate_ND

em ission_rate_MDL

em ission_factor

em ission_factor_units

em ission_factor_ND

em ission_factor_MDL

run_pollutant_comment Page 62sampling_run_pollutants1 run_pollutant_comment Page 63sampling_run_fuel

facility _id report_id sampling_port_id run_id fuel_pollutant fuel_conc fuel_conc_units fuel_conc_ND

fuel_conc_MDL Page 64sampling_run_fuel fuel_conc_MDL Page 65