# Relationship history for MSHA mine 4404818

Current hierarchy: **Stanley John B → J R & R Coal Company Inc → Mine 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

- **controller_controls_mine:** Minco Corp & Westbury Development Corp → Mine No 1; 1975-04-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Westbury Coal Mining Partnership → Mine No 1; 1977-06-01 to 1977-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Minco Corp & Westbury Development Corp → Westbury Coal Mining Partnership; 1977-06-01 to 1977-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Middle Creek Coal Corp → Mine No 1; 1977-09-28 to 1978-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Rash Russell → Mine No 1; 1977-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rash Russell → Middle Creek Coal Corp; 1977-09-28 to 1978-12-26; source msha-controller-operator-history
- **operator_operates_mine:** J K & G Coal Corp → Mine No 1; 1978-12-27 to 1982-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Ronald & George Kidd → Mine No 1; 1978-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Ronald & George Kidd → J K & G Coal Corp; 1978-12-27 to 1982-03-08; source msha-controller-operator-history
- **operator_operates_mine:** J R & R Coal Company Inc → Mine No 1; 1982-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley John B → Mine No 1; 1982-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley John B → J R & R Coal Company Inc; 1982-03-09 to current/open; source msha-controller-operator-history