# Relationship history for MSHA mine 4404989

Current hierarchy: **Stacy Chuck → Cheyenne Coal Corp → No 5**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Van Dyke James Ray Et Al → No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stacy Chuck Et Al → No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bill Branch Coal Company Inc → No 5; 1978-04-01 to 1979-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Van Dyke James Ray Et Al → Bill Branch Coal Company Inc; 1978-04-01 to 1979-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Coal Corp → No 5; 1979-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Chuck Et Al → Cheyenne Coal Corp; 1979-08-02 to current/open; source msha-controller-operator-history