# Relationship history for MSHA mine 1516078

Current hierarchy: **Crawford Jeff--Samuel W Rose Jr → Wolf Creek Coal Company → 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

- **controller_controls_mine:** Christian Michael Et Al → No 1 Mine; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & F Coal Company → No 1 Mine; 1987-06-01 to 1987-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Christian Michael Et Al → M & F Coal Company; 1987-06-01 to 1987-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Wolf Creek Coal Company → No 1 Mine; 1987-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Jeff--Samuel W Rose Jr Et Al → No 1 Mine; 1987-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Jeff--Samuel W Rose Jr Et Al → Wolf Creek Coal Company; 1987-12-14 to current/open; source msha-controller-operator-history