# Relationship history for MSHA mine 0405242

Current hierarchy: **James M  Syar → Syar Industries Inc → Napa Shop**

- 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:** James M  Syar et al → Napa Shop; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Syar Industries Inc → Napa Shop; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James M  Syar et al → Syar Industries Inc; 1994-05-01 to current/open; source msha-controller-operator-history