# Relationship history for MSHA mine 4406243

Current hierarchy: **Adkins Tolbert → Doncar Inc → No 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

- **controller_controls_mine:** Clayburne Charles R → No 1; 1982-06-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jeff Coal Inc → No 1; 1985-08-01 to 1992-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Clayburne Charles R → Jeff Coal Inc; 1985-08-01 to 1992-11-29; source msha-controller-operator-history
- **controller_controls_mine:** MAPCO Inc → No 1; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Permac Inc → No 1; 1992-11-30 to 1993-05-05; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Permac Inc; 1992-11-30 to 1993-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Grady  Keene → No 1; 1993-02-05 to 1994-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Star Mining Inc → No 1; 1993-05-06 to 1994-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Grady  Keene → Star Mining Inc; 1993-05-06 to 1994-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Permac Inc → No 1; 1994-01-20 to 1994-03-07; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Permac Inc; 1994-01-20 to 1994-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Doncar Inc → No 1; 1994-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Tolbert Et Al → No 1; 1994-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Tolbert Et Al → Doncar Inc; 1994-03-08 to current/open; source msha-controller-operator-history