# Relationship history for MSHA mine 4404936

Current hierarchy: **Keen Elmer → Eagle Branch Coal Company Inc → No1**

- 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:** Met Corp → No1; 1978-01-01 to 1980-05-19; source msha-controller-operator-history
- **controller_controls_mine:** West James G → No1; 1978-01-01 to 1980-05-19; source msha-controller-operator-history
- **controller_controls_operator:** West James G → Met Corp; 1978-01-01 to 1980-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Met Inc → No1; 1980-05-20 to 1984-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Rosbal → No1; 1980-05-20 to 1984-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Rosbal → Met Inc; 1980-05-20 to 1984-02-29; source msha-controller-operator-history
- **operator_operates_mine:** B & R Coal Company Inc → No1; 1984-03-01 to 1984-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Bostic Carnie → No1; 1984-03-01 to 1984-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Bostic Carnie → B & R Coal Company Inc; 1984-03-01 to 1984-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Branch Coal Company Inc → No1; 1984-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keen Elmer → No1; 1984-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keen Elmer → Eagle Branch Coal Company Inc; 1984-12-04 to current/open; source msha-controller-operator-history