# Relationship history for MSHA mine 1514649

Current hierarchy: **Mc Daniel Aster & Luther--Jack Smith → Big Edd Coal Company → Big Edd 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

- **operator_operates_mine:** Ryan Coal Company → Big Edd No 1; 1984-06-01 to 1985-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Patterson Maxine-Robert Rice Et Al → Big Edd No 1; 1984-06-01 to 1985-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Patterson Maxine-Robert Rice Et Al → Ryan Coal Company; 1984-06-01 to 1985-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Big Edd Coal Company → Big Edd No 1; 1985-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Daniel Aster & Luther--Jack Smith Et Al → Big Edd No 1; 1985-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Daniel Aster & Luther--Jack Smith Et Al → Big Edd Coal Company; 1985-03-29 to current/open; source msha-controller-operator-history