# Relationship history for MSHA mine 3608678

Current hierarchy: **Robert E  Murray → Mon Valley Transportation Center Inc → Monvalley Transportation Center Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Glassport Transportation Center Inc → Monvalley Transportation Center Inc; 1994-06-01 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_mine:** James G  Kuntz → Monvalley Transportation Center Inc; 1994-06-01 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_operator:** James G  Kuntz → Glassport Transportation Center Inc; 1994-06-01 to 1996-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Mon Valley Transportation Center Inc → Monvalley Transportation Center Inc; 1996-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Monvalley Transportation Center Inc; 1996-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Mon Valley Transportation Center Inc; 1996-01-23 to current/open; source msha-controller-operator-history