# Relationship history for MSHA mine 2200510

Current hierarchy: **Lone Star Industries Inc → Lone Star Industries Inc → Brandon 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Gulf + Western Industries Inc → Brandon Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc → Brandon Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marquette Company → Brandon Quarry; 1979-01-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Gulf + Western Industries Inc → Marquette Company; 1979-01-01 to 1982-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Lone Star Industries Inc → Brandon Quarry; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc → Lone Star Industries Inc; 1982-04-15 to current/open; source msha-controller-operator-history