# Relationship history for MSHA mine 4404986

Current hierarchy: **Coal Energy Company Inc → Coal Energy Company Inc → No 3**

- 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:** Coal Energy Company Inc → No 3; 1977-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Chance Coal Company → No 3; 1978-03-01 to 1978-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Toby & Teddy Et Al → No 3; 1978-03-01 to 1978-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Toby & Teddy Et Al → Big Chance Coal Company; 1978-03-01 to 1978-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Coal Energy Company Inc → No 3; 1978-10-27 to 1979-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Coal Energy Company Inc → Coal Energy Company Inc; 1978-10-27 to 1979-04-04; source msha-controller-operator-history
- **operator_operates_mine:** G B Inc Of Va → No 3; 1979-04-05 to 1979-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Roger → No 3; 1979-04-05 to 1979-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Roger → G B Inc Of Va; 1979-04-05 to 1979-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Coal Energy Company Inc → No 3; 1979-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coal Energy Company Inc → Coal Energy Company Inc; 1979-06-22 to current/open; source msha-controller-operator-history