# Relationship history for MSHA mine 1509738

Current hierarchy: **Dixon James & Silas → C & W Coal Company → No 1**

- 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:** Big Rock Coal Company → No 1; 1976-06-17 to 1980-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Gibson Jack E → No 1; 1976-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gibson Jack E → Big Rock Coal Company; 1976-06-17 to 1980-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Haddix Shafter & Silas Joseph → No 1; 1980-04-07 to 1982-02-15; source msha-controller-operator-history
- **operator_operates_mine:** S & S Coal Company → No 1; 1980-08-14 to 1982-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Haddix Shafter & Silas Joseph → S & S Coal Company; 1980-08-14 to 1982-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Lynn Dale Coal Company Inc → No 1; 1982-02-16 to 1985-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Clayton Gene → No 1; 1982-02-16 to 1985-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Clayton Gene → Lynn Dale Coal Company Inc; 1982-02-16 to 1985-06-23; source msha-controller-operator-history
- **operator_operates_mine:** C & W Coal Company → No 1; 1985-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dixon James & Silas → No 1; 1985-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dixon James & Silas → C & W Coal Company; 1985-06-24 to current/open; source msha-controller-operator-history