# Relationship history for MSHA mine 0800892

Current hierarchy: **Vecellio Group Inc → White Rock Quarries → WHITE ROCK QUARRIES - SOUTH #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** A J House & Sons Inc → WHITE ROCK QUARRIES - SOUTH #2; 1978-03-09 to 1988-05-17; source msha-controller-operator-history
- **controller_controls_mine:** House Hugh A Et Al → WHITE ROCK QUARRIES - SOUTH #2; 1978-03-09 to 1988-05-17; source msha-controller-operator-history
- **controller_controls_operator:** House Hugh A Et Al → A J House & Sons Inc; 1978-03-09 to 1988-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Vecellio Group Inc → WHITE ROCK QUARRIES - SOUTH #2; 1986-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Florida Materials Inc → WHITE ROCK QUARRIES - SOUTH #2; 1988-05-18 to 2001-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Scancem International Ltd & Ab Fardig Betong → WHITE ROCK QUARRIES - SOUTH #2; 1988-05-18 to 2001-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Scancem International Ltd & Ab Fardig Betong → Continental Florida Materials Inc; 1988-05-18 to 2001-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Continental Florida Materials Inc → WHITE ROCK QUARRIES - SOUTH #2; 2001-01-15 to 2005-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → WHITE ROCK QUARRIES - SOUTH #2; 2001-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Continental Florida Materials Inc; 2001-01-15 to 2005-01-06; source msha-controller-operator-history
- **operator_operates_mine:** White Rock Quarries → WHITE ROCK QUARRIES - SOUTH #2; 2005-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vecellio Group Inc → White Rock Quarries; 2005-01-07 to current/open; source msha-controller-operator-history