# Relationship history for MSHA mine 1517100

Current hierarchy: **Hall Tommy A → Deer Cross Quarry → DEER CROSS 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

- **operator_operates_mine:** Warrick Minerals Inc → DEER CROSS QUARRY; 1991-08-01 to 1992-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Bruce Mark H → DEER CROSS QUARRY; 1991-08-01 to 1992-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Bruce Mark H → Warrick Minerals Inc; 1991-08-01 to 1992-04-14; source msha-controller-operator-history
- **operator_operates_mine:** William Allen Basinger → DEER CROSS QUARRY; 1992-04-15 to 1995-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Basinger William Allen → DEER CROSS QUARRY; 1992-04-15 to 1995-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Basinger William Allen → William Allen Basinger; 1992-04-15 to 1995-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Deer Cross Quarry → DEER CROSS QUARRY; 1995-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hall Tommy A → DEER CROSS QUARRY; 1995-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hall Tommy A → Deer Cross Quarry; 1995-09-21 to current/open; source msha-controller-operator-history