# Relationship history for MSHA mine 4404089

Current hierarchy: **Stacy Chuck → Cheyenne Coal Corp → No 4 Mine**

- 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:** Stacy Chuck Et Al → No 4 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Deel Thomas G & Bill → No 4 Mine; 1975-04-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B P & K Mining Inc → No 4 Mine; 1975-05-01 to 1977-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Bernie  Hurley et al → No 4 Mine; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernie  Hurley et al → B P & K Mining Inc; 1975-05-01 to 1977-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Hurley et al → B P & K Mining Inc; 1975-05-01 to 1977-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Coal Company Inc → No 4 Mine; 1977-05-05 to 1977-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Deel Thomas G & Bill → Cumberland Coal Company Inc; 1977-05-05 to 1977-06-15; source msha-controller-operator-history
- **operator_operates_mine:** D & L Coal Company → No 4 Mine; 1977-06-16 to 1977-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Varney Danny Et Al → No 4 Mine; 1977-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Varney Danny Et Al → D & L Coal Company; 1977-06-16 to 1977-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Coal Corp → No 4 Mine; 1977-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Chuck Et Al → Cheyenne Coal Corp; 1977-12-28 to current/open; source msha-controller-operator-history