# Relationship history for MSHA mine 0301416

Current hierarchy: **Danny  Hansbrough → Ouachita Rock → OUACHITA ROCK**

- 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:** Abernathy Sand & Gravel Company → OUACHITA ROCK; 1978-03-09 to 1983-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Loyal  Abernathy → OUACHITA ROCK; 1978-03-09 to 1983-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Loyal  Abernathy → Abernathy Sand & Gravel Company; 1978-03-09 to 1983-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Mc Mellon Sand & Gravel → OUACHITA ROCK; 1983-10-18 to 1998-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Jerry W  Mc Mellon → OUACHITA ROCK; 1983-10-18 to 1998-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Jerry W  Mc Mellon → Mc Mellon Sand & Gravel; 1983-10-18 to 1998-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Ouachita Rock → OUACHITA ROCK; 1998-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Hansbrough → OUACHITA ROCK; 1998-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Hansbrough → Ouachita Rock; 1998-05-04 to current/open; source msha-controller-operator-history