# Relationship history for MSHA mine 4405269

Current hierarchy: **Chester  Holbrook → Tosh Coal Company → Tipple #2**

- 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

- **controller_controls_mine:** William D  Humphreys et al → Tipple #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greater Wise Inc → Tipple #2; 1979-08-01 to 1987-01-08; source msha-controller-operator-history
- **controller_controls_operator:** William D  Humphreys et al → Greater Wise Inc; 1979-08-01 to 1987-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Kenmar Coal Company → Tipple #2; 1987-01-09 to 1994-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Richardson Melvin A → Tipple #2; 1987-01-09 to 1994-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Melvin A → Kenmar Coal Company; 1987-01-09 to 1994-04-07; source msha-controller-operator-history
- **operator_operates_mine:** North Fork Coal Sales → Tipple #2; 1994-04-08 to 1998-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Willis  Vicars → Tipple #2; 1994-04-08 to 1998-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Willis  Vicars → North Fork Coal Sales; 1994-04-08 to 1998-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Holbrook → Tipple #2; 1996-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian K  Mitchell et al → Tipple #2; 1996-04-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyldwood Enterprises Inc → Tipple #2; 1998-04-28 to 1998-11-16; source msha-controller-operator-history
- **controller_controls_operator:** Brian K  Mitchell et al → Wyldwood Enterprises Inc; 1998-04-28 to 1998-11-16; source msha-controller-operator-history
- **operator_operates_mine:** Tosh Coal Company → Tipple #2; 1998-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Holbrook → Tosh Coal Company; 1998-11-17 to current/open; source msha-controller-operator-history