2024 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2023 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2022 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2021 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2020 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2019 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2016 30 CFR 817.57 – What additional performance standards apply to mining activities conducted in or through a perennial or intermittent stream or on the surface of land within 100 feet of a perennial or intermittent stream?

2015 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2014 30 CFR 817.57 – Hydrologic balance: Surface activities in or adjacent to perennial or intermittent streams

2010 30 CFR 817.57 – Hydrologic balance: Stream buffer zones

2009 30 CFR 817.57 – Hydrologic balance: Stream buffer zones