# Relationship history for MSHA mine 1519946

Current hierarchy: **Jacob A  Hubbard; Hunter R  Hubbard; E Sue  Hubbard → Trace Branch Mining, LLC → Trace 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

- **operator_operates_mine:** Trace Branch Mining, LLC → Trace Branch; 2023-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunter R  Hubbard et al → Trace Branch; 2023-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunter R  Hubbard et al → Trace Branch Mining, LLC; 2023-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacob A  Hubbard et al → Trace Branch Mining, LLC; 2023-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E Sue  Hubbard et al → Trace Branch Mining, LLC; 2023-04-28 to current/open; source msha-controller-operator-history