# Relationship history for MSHA mine 4405709

Current hierarchy: **James Wayne  Estep → Warren Coal Company Inc → 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:** Van Dyke James Ray Et Al → No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bill Branch Coal Company Inc → No 4; 1981-08-01 to 1986-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Van Dyke James Ray Et Al → Bill Branch Coal Company Inc; 1981-08-01 to 1986-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Bill Branch Coal Company Inc → No 4; 1986-02-20 to 1987-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Altizer Eugene → No 4; 1986-02-20 to 1987-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Altizer Eugene → Bill Branch Coal Company Inc; 1986-02-20 to 1987-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Bill Branch Coal Company Inc → No 4; 1987-06-08 to 1993-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Mc Glothlin Dors → No 4; 1987-06-08 to 1993-03-09; source msha-controller-operator-history
- **controller_controls_operator:** Mc Glothlin Dors → Bill Branch Coal Company Inc; 1987-06-08 to 1993-03-09; source msha-controller-operator-history
- **controller_controls_mine:** James Wayne  Estep → No 4; 1991-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Carbon Inc → No 4; 1993-03-10 to 1993-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Dennis Allen  Ramey → No 4; 1993-03-10 to 1993-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Dennis Allen  Ramey → Virginia Carbon Inc; 1993-03-10 to 1993-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Warren Coal Company Inc → No 4; 1993-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Wayne  Estep → Warren Coal Company Inc; 1993-10-20 to current/open; source msha-controller-operator-history