# Relationship history for MSHA mine 1507627

Current hierarchy: **Childers Johnie → Jewel Coal Company → No 128 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:** Smallwood James A → No 128 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Morgan Dean & Morgan A → No 128 Mine; 1973-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Smallwood Coal Company → No 128 Mine; 1974-11-08 to 1975-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Smallwood James A → Smallwood Coal Company; 1974-11-08 to 1975-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Double A Coal Company → No 128 Mine; 1975-12-11 to 1977-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Morgan Dean & Morgan A → Double A Coal Company; 1975-12-11 to 1977-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Round Tree Coal Company → No 128 Mine; 1977-03-04 to 1978-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Moore Larry A → No 128 Mine; 1977-03-04 to 1978-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Moore Larry A → Round Tree Coal Company; 1977-03-04 to 1978-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Jewel Coal Company → No 128 Mine; 1978-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Childers Johnie → No 128 Mine; 1978-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childers Johnie → Jewel Coal Company; 1978-04-20 to current/open; source msha-controller-operator-history