2024 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2023 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2022 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2021 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2020 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2018 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2017 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2015 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2014 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2013 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2012 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood

2010 30 USC 611 – Common varieties of sand, stone, gravel, pumice, pumicite, or cinders, and petrified wood