# Relationship history for MSHA mine 1512647

Current hierarchy: **Anthony K  Dotson; Mark  Dotson → Abm Coal Company Inc → No 2 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

- **operator_operates_mine:** Fox Knob Coal Company Inc → No 2 Mine; 1980-12-01 to 1988-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Energy Resources Ltd → No 2 Mine; 1980-12-01 to 1988-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Energy Resources Ltd → Fox Knob Coal Company Inc; 1980-12-01 to 1988-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Paula Ann Coal Company Inc → No 2 Mine; 1988-05-24 to 1989-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Chasteen Helen → No 2 Mine; 1988-05-24 to 1989-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Chasteen Helen → Paula Ann Coal Company Inc; 1988-05-24 to 1989-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Abm Coal Company Inc → No 2 Mine; 1989-06-05 to 1994-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Blair Beth → No 2 Mine; 1989-06-05 to 1994-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Blair Beth → Abm Coal Company Inc; 1989-06-05 to 1994-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Anthony K  Dotson et al → No 2 Mine; 1990-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Abm Coal Company Inc → No 2 Mine; 1994-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony K  Dotson et al → Abm Coal Company Inc; 1994-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Dotson et al → Abm Coal Company Inc; 1994-11-21 to current/open; source msha-controller-operator-history