Versions of Iowa Code 309.63 - Gravel beds on LawServer 2024 Iowa Code 309.63 – Gravel beds 2023 Iowa Code 309.63 – Gravel beds 2022 Iowa Code 309.63 – Gravel beds 2020 Iowa Code 309.63 – Gravel beds 2018 Iowa Code 309.63 – Gravel beds 2016 Iowa Code 309.63 – Gravel beds 2014 Iowa Code 309.63 – Gravel beds. 2009 Iowa Code 309.63 – Gravel beds