2023 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish

2022 Washington Code 90.48.270 – Sewage drainage basins–Authority of department to delineate and establish

2020 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish

2019 Washington Code 90.48.270

2018 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish

2016 Washington Code 90.48.270 – Sewage drainage basins–Authority of department to delineate and establish

2015 Washington Code 90.48.270 – Sewage drainage basins–Authority of department to delineate and establish

2014 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish

2013 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish

2009 Washington Code 90.48.270 – Sewage drainage basins — Authority of department to delineate and establish