# Relationship history for MSHA mine 4603379

Current hierarchy: **Chafin John C Sr → Chafin Coal Company Inc → 10-C 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:** Chafin John C Sr → 10-C Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laura Coal & Coke Company Inc → 10-C Mine; 1950-01-01 to 1976-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Dickenson Carl J → 10-C Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dickenson Carl J → Laura Coal & Coke Company Inc; 1950-01-01 to 1976-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → 10-C Mine; 1976-08-28 to 1979-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1976-08-28 to 1979-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Korchler Coal Company Inc → 10-C Mine; 1979-10-10 to 1980-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Tyson Richard E → 10-C Mine; 1979-10-10 to 1980-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Tyson Richard E → Korchler Coal Company Inc; 1979-10-10 to 1980-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → 10-C Mine; 1980-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1980-12-31 to current/open; source msha-controller-operator-history