2023 Washington Code 78.60.090 – Casing requirements

2022 Washington Code 78.60.090 – Casing requirements

2020 Washington Code 78.60.090 – Casing requirements

2019 Washington Code 78.60.090

2018 Washington Code 78.60.090 – Casing requirements

2016 Washington Code 78.60.090 – Casing requirements

2015 Washington Code 78.60.090 – Casing requirements

2014 Washington Code 78.60.090 – Casing requirements

2013 Washington Code 78.60.090 – Casing requirements

2009 Washington Code 78.60.090 – Casing requirements