# Relationship history for MSHA mine 0202429

Current hierarchy: **Bryant R Smith → Smithco Ent Inc → Bobbitt Silica**

- 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:** Fayette  McFarland et al → Bobbitt Silica; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Farland & Hullinger → Bobbitt Silica; 1988-05-01 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Fayette  McFarland et al → Mc Farland & Hullinger; 1988-05-01 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Sidney  Hullinger et al → Mc Farland & Hullinger; 1988-05-01 to 1999-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Smithco Ent Inc → Bobbitt Silica; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Judy E  Smith → Bobbitt Silica; 1999-03-01 to 2017-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Judy E  Smith → Smithco Ent Inc; 1999-03-01 to 2017-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Bryant R Smith → Bobbitt Silica; 2017-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryant R Smith → Smithco Ent Inc; 2017-01-04 to current/open; source msha-controller-operator-history