# Relationship history for MSHA mine 1511124

Current hierarchy: **Bentley Marvin → Stoneway Coals Inc → 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:** Burke Francis D → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northstar Mines Inc → No 1 Mine; 1978-03-01 to 1978-09-06; source msha-controller-operator-history
- **controller_controls_operator:** Burke Francis D → Northstar Mines Inc; 1978-03-01 to 1978-09-06; source msha-controller-operator-history
- **operator_operates_mine:** Walls Inc → No 1 Mine; 1978-09-07 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Walls Amos → No 1 Mine; 1978-09-07 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Walls Amos → Walls Inc; 1978-09-07 to 1982-02-18; source msha-controller-operator-history
- **operator_operates_mine:** B J & T Resources Ltd → No 1 Mine; 1982-02-19 to 1982-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Booher Jack-Paul Thomas Et Al → No 1 Mine; 1982-02-19 to 1982-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Booher Jack-Paul Thomas Et Al → B J & T Resources Ltd; 1982-02-19 to 1982-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Stoneway Coals Inc → No 1 Mine; 1982-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bentley Marvin → No 1 Mine; 1982-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bentley Marvin → Stoneway Coals Inc; 1982-05-06 to current/open; source msha-controller-operator-history