# Relationship history for MSHA mine 1511191

Current hierarchy: **Hess Jimmie Leon → Big Buck Mining Of Kentucky Inc → No 1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Meta Coal Company Inc → No 1 Mine; 1978-04-01 to 1983-05-01; source msha-controller-operator-history
- **controller_controls_mine:** May Cecil R & Gregory--Don Williamson & Bobby G Ra → No 1 Mine; 1978-04-01 to 1983-05-01; source msha-controller-operator-history
- **controller_controls_operator:** May Cecil R & Gregory--Don Williamson & Bobby G Ra → Meta Coal Company Inc; 1978-04-01 to 1983-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Big Buck Mining Of Kentucky Inc → No 1 Mine; 1983-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hess Jimmie Leon Et Al → No 1 Mine; 1983-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hess Jimmie Leon Et Al → Big Buck Mining Of Kentucky Inc; 1983-05-02 to current/open; source msha-controller-operator-history