# Relationship history for MSHA mine 4003477

Current hierarchy: **James Carl  Wallace → Carl Wallace Quarry → Carl Wallace Quarries**

- 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 Carl  Wallace → Carl Wallace Quarries; 2009-06-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carl Wallace Quarry → Carl Wallace Quarries; 2017-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Carl  Wallace → Carl Wallace Quarry; 2017-05-03 to current/open; source msha-controller-operator-history