Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
BUCKSKIN MINING CO GILLETTE WY
9543 N HWY 14-16, GILLETTE, WY, 82716
Parent company: KIEWIT MINING GROUP
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Toluene | Lead | Mercury | Total (lbs) | ||
| 2024 | — | 6 | 0 | 6 | ||
| 2023 | — | 8 | 0 | 8 | ||
| 2022 | — | 9 | 0 | 10 | ||
| 2021 | — | 7 | 0 | 7 | ||
| 2020 | — | 7 | 0 | 8 | ||
| 2019 | — | 11 | 0 | 11 | ||
| 2018 | — | 9 | 0 | 9 | ||
| 2017 | — | 9 | 0 | 10 | ||
| 2016 | — | 6 | 0 | 6 | ||
| 2015 | — | 9 | 0 | 9 | ||
| 2014 | — | 11 | 0 | 11 | ||
| 2013 | — | 10 | 0 | 10 | ||
| 2012 | — | 18 | 0 | 19 | ||
| 2011 | — | 21 | 0 | 21 | ||
| 2010 | — | 18 | 0 | 19 | ||
| 2009 | — | 16 | 0 | 16 | ||
| 2008 | 30,972 | 6 | 0 | 30,978 | ||
| 2006 | — | 5 | 0 | 5 | ||
| 2005 | — | 3 | 0 | 3 | ||
| 2004 | — | 4 | 0 | 4 | ||
| 2003 | — | 11 | 0 | 11 | ||
| 2002 | — | 10 | 0 | 10 | ||
| 2001 | — | 5 | 0 | 6 | ||
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.