# Relationship history for MSHA mine 1201625

Current hierarchy: **English Coal Company Inc → English Coal Company Inc → E-Victor No 4**

- 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:** Will Gene C Et Al → E-Victor No 4; 1975-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** English Coal Company Inc → E-Victor No 4; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Creek Mining Company Inc → E-Victor No 4; 1977-12-01 to 1979-01-17; source msha-controller-operator-history
- **controller_controls_operator:** English Coal Company Inc → Blue Creek Mining Company Inc; 1977-12-01 to 1979-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Will Construction Company Inc → E-Victor No 4; 1979-01-18 to 1980-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Will Gene C Et Al → Will Construction Company Inc; 1979-01-18 to 1980-09-01; source msha-controller-operator-history
- **operator_operates_mine:** English Coal Company Inc → E-Victor No 4; 1980-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** English Coal Company Inc → E-Victor No 4; 1980-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** English Coal Company Inc → English Coal Company Inc; 1980-09-02 to current/open; source msha-controller-operator-history