# Relationship history for MSHA mine 3102147

Current hierarchy: **John  Glover → Glover Materials Inc → MEHERRIN 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

- **controller_controls_mine:** John  Glover et al → MEHERRIN MINE; 1988-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glover Materials Inc → MEHERRIN MINE; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Glover et al → Glover Materials Inc; 2000-05-01 to current/open; source msha-controller-operator-history