# Relationship history for MSHA mine 1001854

Current hierarchy: **Bayer AG → Ruveon LLC → BFB & Ballard Mines**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Monsanto Company → BFB & Ballard Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monsanto Company → BFB & Ballard Mines; 1989-11-01 to 1998-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Monsanto Company → Monsanto Company; 1989-11-01 to 1998-03-02; source msha-controller-operator-history
- **operator_operates_mine:** P4 Production, LLC → BFB & Ballard Mines; 1998-03-03 to 2023-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Monsanto Corp & Solutia Inc → BFB & Ballard Mines; 1998-03-03 to 2006-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Monsanto Corp & Solutia Inc → P4 Production, LLC; 1998-03-03 to 2006-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Monsanto Company → BFB & Ballard Mines; 2006-05-17 to 2018-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Monsanto Company → P4 Production, LLC; 2006-05-17 to 2018-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Bayer AG → BFB & Ballard Mines; 2018-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bayer AG → P4 Production, LLC; 2018-06-07 to 2023-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Bayer AG → BFB & Ballard Mines; 2021-11-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ruveon LLC → BFB & Ballard Mines; 2023-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bayer AG → Ruveon LLC; 2023-04-11 to current/open; source msha-controller-operator-history