# Relationship history for MSHA mine 2600734

Current hierarchy: **David  Sexton → Nutritional Additives → Sexton 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:** Sexton Family Trust → Sexton Mine; 1950-01-01 to 2007-04-09; source msha-controller-operator-history
- **controller_controls_mine:** David  Sexton et al → Sexton Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Sexton et al → Sexton Family Trust; 1950-01-01 to 2007-04-09; source msha-controller-operator-history
- **operator_operates_mine:** Nutritional Additives → Sexton Mine; 2007-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Sexton et al → Sexton Mine; 2007-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Sexton et al → Nutritional Additives; 2007-04-10 to current/open; source msha-controller-operator-history