# Relationship history for MSHA mine 4605571

Current hierarchy: **Holifield Chris H Jr → Bluestone Quarries Inc → MINE NO. 1**

- 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

- **operator_operates_mine:** Lane Construction Corp → MINE NO. 1; 1950-01-01 to 1994-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Lane Industries Inc → MINE NO. 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lane Industries Inc → Lane Construction Corp; 1950-01-01 to 1994-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Bluestone Quarries Inc → MINE NO. 1; 1994-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holifield Chris H Jr → MINE NO. 1; 1994-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holifield Chris H Jr → Bluestone Quarries Inc; 1994-03-01 to current/open; source msha-controller-operator-history