# Relationship history for MSHA mine 4401007

Current hierarchy: **Excello Coal Corp → Excello Coal Corp → Dock 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:** Virginia By-Products → Dock No 1; 1950-01-01 to 1978-04-30; source msha-controller-operator-history
- **controller_controls_mine:** E H  Lester → Dock No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E H  Lester → Virginia By-Products; 1950-01-01 to 1978-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Excello Coal Corp → Dock No 1; 1975-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Top Fuel Inc → Dock No 1; 1978-01-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John B Mining Company Inc → Dock No 1; 1978-05-01 to 1980-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Top Fuel Inc → John B Mining Company Inc; 1978-05-01 to 1980-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Virginia By-Products → Dock No 1; 1980-09-26 to 1983-05-09; source msha-controller-operator-history
- **controller_controls_operator:** E H  Lester → Virginia By-Products; 1980-09-26 to 1983-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Deskins Gerald-Lando Deel Et Al → Dock No 1; 1982-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Patterson Coal Company Inc → Dock No 1; 1983-05-10 to 1985-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Deskins Gerald-Lando Deel Et Al → Patterson Coal Company Inc; 1983-05-10 to 1985-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Virginia By-Product → Dock No 1; 1985-10-01 to 1986-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Dock No 1; 1985-10-01 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Virginia By-Product; 1985-10-01 to 1986-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Excello Coal Corp → Dock No 1; 1986-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Excello Coal Corp → Excello Coal Corp; 1986-01-09 to current/open; source msha-controller-operator-history