# Relationship history for MSHA mine 4400064

Current hierarchy: **Carmeuse Holding SA → O-N Minerals (Chemstone Company) → Plant #2**

- 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

- **operator_operates_mine:** James River Limestone Company Inc → Plant #2; 1950-01-01 to 1996-06-28; source msha-controller-operator-history
- **controller_controls_mine:** James River Limestone Company Inc → Plant #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Limestone Company Inc → James River Limestone Company Inc; 1950-01-01 to 1996-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Global Stone James River → Plant #2; 1996-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Global Stone Corp → Plant #2; 1996-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Global Stone Corp → Global Stone James River; 1996-06-29 to 1998-06-21; source msha-controller-operator-history
- **operator_operates_mine:** O-N Minerals (James River) Company → Plant #2; 1998-06-22 to 2009-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Plant #2; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → O-N Minerals (James River) Company; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Plant #2; 2008-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → O-N Minerals (James River) Company; 2008-02-13 to 2009-01-13; source msha-controller-operator-history
- **operator_operates_mine:** O-N Minerals (Chemstone Company) → Plant #2; 2009-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → O-N Minerals (Chemstone Company); 2009-01-14 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → O-N Minerals (Chemstone Company); 2009-01-14 to current/open; source msha-controller-operator-history