Under the Pollution Prevention Act of 1990 (PPA), TRI collects information to track industry progress in reducing waste generation and moving towards safer waste management alternatives. Measures that facilities have taken to prevent pollution and reduce the amount of toxic chemicals entering the environment are shown in the table below. Although factors other than these reported practices contribute to year-to-year changes in releases, results are sorted by largest reduction in order to facilitate identification of pollution prevention successes. View the to learn about this report's features.

List of Facilities in TRI submitting Pollution Prevention Information for Selected Criteria:

Year: between 2016 and 2024

P2 Text Filters: Only show information about source reduction activities Show information about source reduction AND other environmental practices Exclude facilities that reported activity codes but no text descriptions Show information on barriers to implementing source reduction activities Show ALL information reported in pollution prevention data fields Year-to-Year Comparison: Total Waste Total Release [displayed currently] Air Release Land Release Water Release

TRI Facility ID	Facility Name	Address	Chemical Name	Industry	Year	Prior Year Release *	Current Year Release *	Percent Change	Pollution Prevention Information (Activity Codes/Text/[Reduction])	P2 Report	P2 Report URL
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	221112: Fossil Fuel Electric Power Generation	2020	1,461,385.00	1,414,911.00	-3.18	Other Environmental Practices: The barium is included in the backfill in the waste ash for reclamation purposes at the coal mine.		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=N040&ReportingYear=2020&DocCtrlNum=1320218769798&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Nickel	221112: Fossil Fuel Electric Power Generation	2020	31,281.24	30,432.50	-2.71	Other Environmental Practices: metal is in bottom ash used for reclamation in mine pit		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007440020&ReportingYear=2020&DocCtrlNum=1320218769863&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Vanadium (except when contained in an alloy)	221112: Fossil Fuel Electric Power Generation	2020	77,236.00	77,881.00	.84	Other Environmental Practices: metal is in waste ash and used for reclamation in mine pit		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007440622&ReportingYear=2020&DocCtrlNum=1320218769875&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Lead	221112: Fossil Fuel Electric Power Generation	2020	19,389.48	20,099.00	3.66	Other Environmental Practices: metal is part of waste ash that is used as backfill for reclamation at the coal mine		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007439921&ReportingYear=2020&DocCtrlNum=1320218769836&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Manganese	221112: Fossil Fuel Electric Power Generation	2020	97,922.49	102,445.00	4.62	Other Environmental Practices: Metal is in waste ash that is used for backfill in the coal mine for reclamation		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007439965&ReportingYear=2020&DocCtrlNum=1320218769848&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Chromium	221112: Fossil Fuel Electric Power Generation	2020	31,823.40	34,061.00	7.03	Other Environmental Practices: Chromium is part of ash that is disposed of in ash pit for reclamation		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007440473&ReportingYear=2020&DocCtrlNum=1320218769800&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Copper	221112: Fossil Fuel Electric Power Generation	2020	69,643.24	75,988.50	9.11	Other Environmental Practices: Chemical is part of ash that is used for reclamation in coal mine pit		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=0007440508&ReportingYear=2020&DocCtrlNum=1320218769812&Opt=0
82716NLSMP13151	BLACK HILLS CORP - NEIL SIMPSON COMPLEX (BLACK HILLS CORP)	13151 HWY 51, GILLETTE, WY 82718	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	221112: Fossil Fuel Electric Power Generation	2017	1,517,104.86	1,750,091.84	15.36	Other Environmental Practices: The waste ash, which contains barium is being used for fill in the mine reclamation process.		//enviro.epa.gov/enviro/P2_EF_Query.p2_report?FacilityId=82716NLSMP13151&ChemicalId=N040&ReportingYear=2017&DocCtrlNum=1317216177182&Opt=0