# Relationship history for MSHA mine 2003518

Current hierarchy: **Carmeuse Holding SA → Carl Schlegel Inc → Island**

- 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:** David R  Schlegel → Island; 1950-01-01 to 2013-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Schlegel et al → Island; 2013-12-31 to 2022-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Carl Schlegel Inc → Island; 2015-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Schlegel et al → Carl Schlegel Inc; 2015-09-16 to 2022-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Schlegel et al → Carl Schlegel Inc; 2015-09-16 to 2022-01-20; source msha-controller-operator-history
- **controller_controls_operator:** David R  Schlegel → Carl Schlegel Inc; 2015-09-16 to 2013-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Island; 2022-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carl Schlegel Inc; 2022-01-21 to current/open; source msha-controller-operator-history