# Relationship history for MSHA mine 1513575

Current hierarchy: **Bargo Royal → B B & H 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

- **operator_operates_mine:** G & H Coal Company → No 1 Mine; 1982-06-01 to 1983-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Hendrix Rufus Et Al → No 1 Mine; 1982-06-01 to 1985-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Hendrix Rufus Et Al → G & H Coal Company; 1982-06-01 to 1983-02-17; source msha-controller-operator-history
- **operator_operates_mine:** High Energy Coals Inc → No 1 Mine; 1983-02-18 to 1983-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Smith Bobby → No 1 Mine; 1983-02-18 to 1983-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Smith Bobby → High Energy Coals Inc; 1983-02-18 to 1983-07-19; source msha-controller-operator-history
- **operator_operates_mine:** G & H Coal Company → No 1 Mine; 1983-07-20 to 1985-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Hendrix Rufus Et Al → G & H Coal Company; 1983-07-20 to 1985-01-28; source msha-controller-operator-history
- **operator_operates_mine:** G & H Coal Company → No 1 Mine; 1985-01-29 to 1985-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Pennington Hershell Et Al → No 1 Mine; 1985-01-29 to 1985-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Pennington Hershell Et Al → G & H Coal Company; 1985-01-29 to 1985-09-11; source msha-controller-operator-history
- **operator_operates_mine:** W T K Coal Partners → No 1 Mine; 1985-09-12 to 1985-12-12; source msha-controller-operator-history
- **controller_controls_mine:** Trosper James Et Al → No 1 Mine; 1985-09-12 to 1985-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Trosper James Et Al → W T K Coal Partners; 1985-09-12 to 1985-12-12; source msha-controller-operator-history
- **operator_operates_mine:** B B & H Inc → No 1 Mine; 1985-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bargo Royal → No 1 Mine; 1985-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bargo Royal → B B & H Inc; 1985-12-13 to current/open; source msha-controller-operator-history