# Relationship history for MSHA mine 4100906

Current hierarchy: **Sherwin Alumina LLC → Sherwin Alumina Company, LLC → Sherwin Alumina, L.P.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Reynolds Metals Company → Sherwin Alumina, L.P.; 1950-01-01 to 2000-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds Metals Company → Sherwin Alumina, L.P.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds Metals Company → Reynolds Metals Company; 1950-01-01 to 2000-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Sherwin Alumina Company, LLC → Sherwin Alumina, L.P.; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** BPU Reynolds Inc → Sherwin Alumina, L.P.; 2001-01-01 to 2004-04-18; source msha-controller-operator-history
- **controller_controls_operator:** BPU Reynolds Inc → Sherwin Alumina Company, LLC; 2001-01-01 to 2004-04-18; source msha-controller-operator-history
- **controller_controls_mine:** China Minmetals et al → Sherwin Alumina, L.P.; 2004-04-19 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** China Minmetals et al → Sherwin Alumina Company, LLC; 2004-04-19 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** BPU Associates et al → Sherwin Alumina Company, LLC; 2004-04-19 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Glencore International A G → Sherwin Alumina, L.P.; 2007-08-23 to 2009-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Glencore International A G → Sherwin Alumina Company, LLC; 2007-08-23 to 2009-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Sherwin Alumina LLC → Sherwin Alumina, L.P.; 2009-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sherwin Alumina LLC → Sherwin Alumina Company, LLC; 2009-03-20 to current/open; source msha-controller-operator-history