# Relationship history for MSHA mine 1512364

Current hierarchy: **Larry  Thornsberry; Terry  Thornsberry → T L Mining 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:** H & C Coal Company → No 1 Mine; 1980-06-01 to 1982-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Elwood Et Al → No 1 Mine; 1980-06-01 to 1982-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Elwood Et Al → H & C Coal Company; 1980-06-01 to 1982-10-04; source msha-controller-operator-history
- **operator_operates_mine:** T L Mining Inc → No 1 Mine; 1982-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Thornsberry et al → No 1 Mine; 1982-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Thornsberry et al → T L Mining Inc; 1982-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Thornsberry et al → T L Mining Inc; 1982-10-05 to current/open; source msha-controller-operator-history