# Relationship history for MSHA mine 4404776

Current hierarchy: **Chester  Holbrook → Tosh Coal Company → #1 Tipple**

- 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:** Tacoma Fuel Company → #1 Tipple; 1977-01-01 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Hubbard James W-D L Boggs Et Al → #1 Tipple; 1977-01-01 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Hubbard James W-D L Boggs Et Al → Tacoma Fuel Company; 1977-01-01 to 1984-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Tacoma Coal Corp → #1 Tipple; 1984-09-18 to 1985-10-19; source msha-controller-operator-history
- **controller_controls_mine:** John P  Baugues Sr → #1 Tipple; 1984-09-18 to 1985-10-19; source msha-controller-operator-history
- **controller_controls_operator:** John P  Baugues Sr → Tacoma Coal Corp; 1984-09-18 to 1985-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Wright Goebel Et Al → #1 Tipple; 1985-07-01 to 1991-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Winchester Coal Sales Inc → #1 Tipple; 1985-10-20 to 1990-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Bolling Donnie R → #1 Tipple; 1985-10-20 to 1990-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Bolling Donnie R → Winchester Coal Sales Inc; 1985-10-20 to 1990-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Star Coal Company Inc → #1 Tipple; 1990-06-26 to 1991-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Ira Joe → #1 Tipple; 1990-06-26 to 1991-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Ira Joe → Tri-Star Coal Company Inc; 1990-06-26 to 1991-04-16; source msha-controller-operator-history
- **operator_operates_mine:** American Coal Trading Inc → #1 Tipple; 1991-04-17 to 1991-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Wright Goebel Et Al → American Coal Trading Inc; 1991-04-17 to 1991-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Tacoma Coal Corp → #1 Tipple; 1991-08-21 to 1996-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Welsh Charles → #1 Tipple; 1991-08-21 to 1996-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Welsh Charles → Tacoma Coal Corp; 1991-08-21 to 1996-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Tosh Coal Company → #1 Tipple; 1996-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Holbrook → #1 Tipple; 1996-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Holbrook → Tosh Coal Company; 1996-01-24 to current/open; source msha-controller-operator-history