2023 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2022 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2020 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2019 Washington Code 78.60.040

2018 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2016 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2015 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2014 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2013 Washington Code 78.60.040 – Geothermal resources deemed sui generis

2009 Washington Code 78.60.040 – Geothermal resources deemed sui generis