# Relationship history for MSHA mine 1510930

Current hierarchy: **Paul D  Corbin; Mike M  Corbin → Corbin Coal Company Inc → Corbin No 1 Surface 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Paul D  Corbin  et al → Corbin No 1 Surface Mine; 1975-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Parker Elwood Et Al → Corbin No 1 Surface Mine; 1977-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Parker Coal Company → Corbin No 1 Surface Mine; 1977-10-01 to 1979-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Parker Elwood Et Al → Parker Coal Company; 1977-10-01 to 1979-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Corbin Coal Company Inc → Corbin No 1 Surface Mine; 1979-08-13 to 1979-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Paul D  Corbin  et al → Corbin Coal Company Inc; 1979-08-13 to 1979-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Mike M  Corbin  et al → Corbin Coal Company Inc; 1979-08-13 to 1979-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Parker Coal Company → Corbin No 1 Surface Mine; 1979-11-05 to 1980-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Parker Elwood Et Al → Parker Coal Company; 1979-11-05 to 1980-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Corbin Coal Company Inc → Corbin No 1 Surface Mine; 1980-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul D  Corbin  et al → Corbin Coal Company Inc; 1980-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike M  Corbin  et al → Corbin Coal Company Inc; 1980-08-11 to current/open; source msha-controller-operator-history