# Relationship history for MSHA mine 1517493

Current hierarchy: **Anthony K  Dotson; Mark  Dotson → Abm Coal Company Inc → No 4 Mine**

- 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:** Aubra P  Dean et al → No 4 Mine; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony K  Dotson et al → No 4 Mine; 1990-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple C Coal Inc → No 4 Mine; 1994-01-01 to 1994-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Aubra P  Dean et al → Triple C Coal Inc; 1994-01-01 to 1994-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Carl E  McAfee et al → Triple C Coal Inc; 1994-01-01 to 1994-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Abm Coal Company Inc → No 4 Mine; 1994-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony K  Dotson et al → Abm Coal Company Inc; 1994-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Dotson et al → Abm Coal Company Inc; 1994-09-13 to current/open; source msha-controller-operator-history