2024 30 CFR 57.19036 – Headframe height

2023 30 CFR 57.19036 – Headframe height

2022 30 CFR 57.19036 – Headframe height

2021 30 CFR 57.19036 – Headframe height

2020 30 CFR 57.19036 – Headframe height

2019 30 CFR 57.19036 – Headframe height

2016 30 CFR 57.19036 – Headframe height

2015 30 CFR 57.19036 – Headframe height

2014 30 CFR 57.19036 – Headframe height

2010 30 CFR 57.19036 – Headframe height

2009 30 CFR 57.19036 – Headframe height