# Relationship history for MSHA mine 0103049

Current hierarchy: **Wright James → Walker County Rock Products Inc → Quarry #1**

- 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:** Walker County Rock Products Inc → Quarry #1; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wright James Et Al → Quarry #1; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wright James Et Al → Walker County Rock Products Inc; 1995-05-01 to current/open; source msha-controller-operator-history