# Relationship history for MSHA mine 1516347

Current hierarchy: **Christian Michael → M & F Coal Company → M & F Coal Company #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:** Christian Michael Et Al → M & F Coal Company #5; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bray Mining Company → M & F Coal Company #5; 1988-04-01 to 1988-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Bray Leon - William Brock Et Al → M & F Coal Company #5; 1988-04-01 to 1988-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Bray Leon - William Brock Et Al → Bray Mining Company; 1988-04-01 to 1988-07-05; source msha-controller-operator-history
- **operator_operates_mine:** M & F Coal Company → M & F Coal Company #5; 1988-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian Michael Et Al → M & F Coal Company; 1988-07-06 to current/open; source msha-controller-operator-history