# Relationship history for MSHA mine 3300013

Current hierarchy: **Carmeuse Holding SA → Carmeuse Lime Inc → Maple Grove Operations**

- 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:** Basic Inc → Maple Grove Operations; 1950-01-01 to 1998-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Asea Brown Boveri Ltd (ABB) → Maple Grove Operations; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asea Brown Boveri Ltd (ABB) → Basic Inc; 1950-01-01 to 1998-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Maple Grove Operations; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ohio Lime Inc → Maple Grove Operations; 1998-04-14 to 2001-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Maple Grove Operations; 1998-04-14 to 2001-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Ohio Lime Inc; 1998-04-14 to 2001-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Ohio Lime Inc → Maple Grove Operations; 2001-04-02 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Maple Grove Operations; 2001-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Ohio Lime Inc; 2001-04-02 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge SA → Ohio Lime Inc; 2001-04-02 to 2001-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse Lime Inc → Maple Grove Operations; 2002-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime Inc; 2002-01-01 to current/open; source msha-controller-operator-history