# Relationship history for MSHA mine 4605979

Current hierarchy: **Christian Donald → Trust Coal Company Inc → #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:** Tri-J Coal Company Inc → #1; 1979-04-01 to 1981-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery Gary A → #1; 1979-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery Gary A → Tri-J Coal Company Inc; 1979-04-01 to 1981-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Tri-J Coal Company Inc → #1; 1981-10-01 to 1982-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Swim Ted → #1; 1981-10-01 to 1982-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Swim Ted → Tri-J Coal Company Inc; 1981-10-01 to 1982-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Silver Dollar Mining Inc → #1; 1982-03-25 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Wood Terry A → #1; 1982-03-25 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Wood Terry A → Silver Dollar Mining Inc; 1982-03-25 to 1982-12-08; source msha-controller-operator-history
- **operator_operates_mine:** N & G Coal Company Inc → #1; 1982-12-09 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Addison James P → #1; 1982-12-09 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Addison James P → N & G Coal Company Inc; 1982-12-09 to 1983-09-07; source msha-controller-operator-history
- **operator_operates_mine:** N & G Coal Company → #1; 1983-09-08 to 1983-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Stevenson Hubert & Herbert Walls → #1; 1983-09-08 to 1983-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Stevenson Hubert & Herbert Walls → N & G Coal Company; 1983-09-08 to 1983-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Hagerman Trucking Company → #1; 1983-12-27 to 1984-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Hagerman Blain → #1; 1983-12-27 to 1984-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Hagerman Blain → Hagerman Trucking Company; 1983-12-27 to 1984-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Trust Coal Company Inc → #1; 1984-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christian Donald → #1; 1984-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian Donald → Trust Coal Company Inc; 1984-10-25 to current/open; source msha-controller-operator-history