# Relationship history for MSHA mine 1202364

Current hierarchy: **Matthew E  Jetmore → Stonehenge Concrete Company Inc → Stonehenge Gravel-Modoc Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Matthew E  Jetmore et al → Stonehenge Gravel-Modoc Plant; 1985-06-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stonehenge Concrete Company Inc → Stonehenge Gravel-Modoc Plant; 2004-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew E  Jetmore et al → Stonehenge Concrete Company Inc; 2004-10-04 to current/open; source msha-controller-operator-history