Facility detail

VIPER MINE

781 600TH ST, ELKHART, IL, 62634

Parent company: KNIGHT HAWK HOLDINGS LLC

Carcinogen PBT — EPA classifications across all reporting years

Year-over-year total releases

Reported on-site TRI releases in pounds, grouped by reporting year.

The 10 chemicals with the highest cumulative on-site releases across all available years.

Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.

Year	Manganese compounds	Zinc compounds	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	Vanadium compounds	Barium And Barium Compounds	Total
2024	—	—	—	—	—	627
2023	—	—	—	—	—	14,792
2022	—	—	21,007	—	—	43,194
2021	—	—	—	—	49,686	61,357
2020	—	16,621	—	—	46,514	77,189
2019	—	40,469	—	—	61,177	372,141
2018	—	129,792	—	—	100,663	252,043
2017	15,363	94,650	95,333	—	—	206,396
2016	—	52,098	53,066	—	—	105,748
2015	29,167	84,571	76,767	—	—	191,699
2014	48,094	135,007	107,047	—	—	291,795
2013	219,435	65,513	65,282	23,918	—	403,936
2012	185,102	42,207	55,411	18,468	—	314,921
2011	204,453	43,888	61,299	20,046	—	344,473
2010	227,439	70,474	67,610	25,130	—	422,005
2009	236,818	—	70,648	25,303	—	373,892
2008	228,606	61,588	68,167	24,039	—	421,440
2007	270,195	78,382	80,458	29,155	—	513,782
2006	236,533	63,189	70,527	24,802	—	435,328
2005	210,005	45,005	65,005	25,005	—	382,661
2004	215,250	50,005	65,005	25,005	—	394,050
2003	220,250	55,005	65,005	25,005	—	394,387
2002	300,250	70,005	65,005	30,005	—	514,432
2001	300,250	70,005	65,005	30,005	—	514,432
2000	211,251	49,818	56,124	21,640	—	361,644
1999	151,505	30,505	50,005	—	—	232,015
1998	184,120	40,010	50,010	—	—	285,400