2023 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2022 Washington Code 43.21C.039 – Metals mining and milling operations–Environmental impact statements required

2020 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2019 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2018 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2016 Washington Code 43.21C.039 – Metals mining and milling operations–Environmental impact statements required

2015 Washington Code 43.21C.039 – Metals mining and milling operations–Environmental impact statements required

2014 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2013 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required

2009 Washington Code 43.21C.039 – Metals mining and milling operations — Environmental impact statements required