# Relationship history for MSHA mine 1519352

Current hierarchy: **Gary L  Barker; Robert  Hatton → Midwest Resources LLC → Big Branch**

- 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:** Gary L  Barker et al → Big Branch; 2007-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Midwest Resources LLC → Big Branch; 2008-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary L  Barker et al → Midwest Resources LLC; 2008-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Hatton et al → Midwest Resources LLC; 2008-11-11 to current/open; source msha-controller-operator-history