# Relationship history for MSHA mine 1516973

Current hierarchy: **Anthony K  Dotson; Mark  Dotson → Abm Coal Company Inc → #3**

- 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:** Abm Coal Company Inc → #3; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Dotson et al → #3; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Dotson et al → Abm Coal Company Inc; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony K  Dotson et al → Abm Coal Company Inc; 1990-08-01 to current/open; source msha-controller-operator-history