# Relationship history for MSHA mine 3304300

Current hierarchy: **Antonin  De Margerie → TOM LLC → Saltillo 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:** Bear Creek Clay Company Inc → Saltillo Mine; 1993-06-01 to 2012-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Tommy L  Dennis → Saltillo Mine; 1993-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tommy L  Dennis → Bear Creek Clay Company Inc; 1993-06-01 to 2012-01-30; source msha-controller-operator-history
- **operator_operates_mine:** TOM LLC → Saltillo Mine; 2012-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Antonin  De Margerie et al → Saltillo Mine; 2012-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonin  De Margerie et al → TOM LLC; 2012-01-31 to current/open; source msha-controller-operator-history