# Relationship history for MSHA mine 1509805

Current hierarchy: **Groom David H & Robert D Deaton → Eastern Deaton Coal Company → No 1 Surface**

- 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:** Flannary Curtis & Harold Jones → No 1 Surface; 1975-11-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & F Coals Inc → No 1 Surface; 1976-07-14 to 1977-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Flannary Curtis & Harold Jones → J & F Coals Inc; 1976-07-14 to 1977-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Fire Clay Fuels Inc → No 1 Surface; 1977-05-16 to 1977-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Holstein Coy Jr → No 1 Surface; 1977-05-16 to 1977-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Holstein Coy Jr → Fire Clay Fuels Inc; 1977-05-16 to 1977-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Deaton Coal Company → No 1 Surface; 1977-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Groom David H & Robert D Deaton → No 1 Surface; 1977-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Groom David H & Robert D Deaton → Eastern Deaton Coal Company; 1977-10-17 to current/open; source msha-controller-operator-history