# Relationship history for MSHA mine 0901054

Current hierarchy: **Carmeuse Holding SA → O-N Minerals (Filler Products) Company → Filler Products Grinding Plant S**

- 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

- **controller_controls_mine:** John H  Waters → Filler Products Grinding Plant S; 1990-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Filler Products Inc → Filler Products Grinding Plant S; 1990-06-01 to 1998-08-31; source msha-controller-operator-history
- **controller_controls_operator:** John H  Waters → Filler Products Inc; 1990-06-01 to 1998-08-31; source msha-controller-operator-history
- **operator_operates_mine:** O-N Minerals (Filler Products) Company → Filler Products Grinding Plant S; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Filler Products Grinding Plant S; 1998-09-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → O-N Minerals (Filler Products) Company; 1998-09-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Filler Products Grinding Plant S; 2008-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → O-N Minerals (Filler Products) Company; 2008-02-13 to current/open; source msha-controller-operator-history