# Relationship history for MSHA mine 3102054

Current hierarchy: **Best Cheer USA → Rowan Granite Quarry Inc → Solar White Quarry**

- 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:** F Browne Gregg Trust → Solar White Quarry; 1981-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Granite Panelwall Company → Solar White Quarry; 1990-05-01 to 1990-09-29; source msha-controller-operator-history
- **controller_controls_operator:** F Browne Gregg Trust → Granite Panelwall Company; 1990-05-01 to 1990-09-29; source msha-controller-operator-history
- **operator_operates_mine:** Rowan Granite Quarry Inc → Solar White Quarry; 1990-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Destag Ag & Lan International Inc → Solar White Quarry; 1990-09-30 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Destag Ag & Lan International Inc → Rowan Granite Quarry Inc; 1990-09-30 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Best Cheer USA → Solar White Quarry; 2005-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Best Cheer USA → Rowan Granite Quarry Inc; 2005-01-01 to current/open; source msha-controller-operator-history