# Relationship history for MSHA mine 4606227

Current hierarchy: **Brewster Thomas → Toney'S Branch Coal Company → C R 1**

- 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:** Statt Coal Company Inc → C R 1; 1980-08-01 to 1981-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery Betty → C R 1; 1980-08-01 to 1981-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery Betty → Statt Coal Company Inc; 1980-08-01 to 1981-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Brewster Thomas → C R 1; 1980-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peytona Coal Company → C R 1; 1981-07-20 to 1982-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Spratt Robert → C R 1; 1981-07-20 to 1982-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Spratt Robert → Peytona Coal Company; 1981-07-20 to 1982-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Walhonde Coal & Construction Inc → C R 1; 1982-07-18 to 1984-11-07; source msha-controller-operator-history
- **controller_controls_mine:** Walhonde Coal & Construction Inc → C R 1; 1982-07-18 to 1984-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Walhonde Coal & Construction Inc → Walhonde Coal & Construction Inc; 1982-07-18 to 1984-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Walhonde Coal & Construction Inc → C R 1; 1984-11-08 to 1987-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Coal & Dock Company Inc → C R 1; 1984-11-08 to 1987-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Coal & Dock Company Inc → Walhonde Coal & Construction Inc; 1984-11-08 to 1987-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Mining Inc → C R 1; 1987-09-28 to 1990-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Jeffrey S → C R 1; 1987-09-28 to 1990-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Jeffrey S → Cheyenne Mining Inc; 1987-09-28 to 1990-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Toney'S Branch Coal Company → C R 1; 1990-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brewster Thomas → Toney'S Branch Coal Company; 1990-12-04 to current/open; source msha-controller-operator-history