# Relationship history for MSHA mine 4405288

Current hierarchy: **Roberts Thomas W → Roberts & Bennett Mining → No 2**

- 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:** Sturgill William Joe → No 2; 1974-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Thomas W Et Al → No 2; 1978-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Low Splint Coal Company Inc → No 2; 1979-09-01 to 1980-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Sturgill William Joe → Low Splint Coal Company Inc; 1979-09-01 to 1980-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Roberts & Bennett Mining → No 2; 1980-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Thomas W Et Al → Roberts & Bennett Mining; 1980-04-23 to current/open; source msha-controller-operator-history