2024 30 CFR 57.20010 – Retaining dams

2023 30 CFR 57.20010 – Retaining dams

2022 30 CFR 57.20010 – Retaining dams

2021 30 CFR 57.20010 – Retaining dams

2020 30 CFR 57.20010 – Retaining dams

2019 30 CFR 57.20010 – Retaining dams

2016 30 CFR 57.20010 – Retaining dams

2015 30 CFR 57.20010 – Retaining dams

2014 30 CFR 57.20010 – Retaining dams

2010 30 CFR 57.20010 – Retaining dams

2009 30 CFR 57.20010 – Retaining dams