# Relationship history for MSHA mine 1504183

Current hierarchy: **Cure John W → Misty Coal Co → No 8 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:** Hodge Coal Co → No 8 Mine; 1950-01-01 to 1974-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Hodge Harvey → No 8 Mine; 1950-01-01 to 1974-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Hodge Harvey → Hodge Coal Co; 1950-01-01 to 1974-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Misty Coal Co → No 8 Mine; 1974-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cure John W → No 8 Mine; 1974-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cure John W → Misty Coal Co; 1974-10-25 to current/open; source msha-controller-operator-history