# Relationship history for MSHA mine 4406706

Current hierarchy: **Hall Raymond H → Mulbell Coal Company Inc → #1 Strip**

- 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:** Mulbel Coal Company Inc → #1 Strip; 1992-07-01 to 1996-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Tolbert P  Mullins → #1 Strip; 1992-07-01 to 1996-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Tolbert P  Mullins → Mulbel Coal Company Inc; 1992-07-01 to 1996-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Mulbell Coal Company Inc → #1 Strip; 1996-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hall Raymond H → #1 Strip; 1996-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hall Raymond H → Mulbell Coal Company Inc; 1996-10-04 to current/open; source msha-controller-operator-history