# Relationship history for MSHA mine 3609397

Current hierarchy: **Steven R  Carpenter → Carpenter Quarry → Carpenter 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:** Carpenter Quarry → Carpenter Quarry #1; 2006-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven R  Carpenter → Carpenter Quarry #1; 2006-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Carpenter → Carpenter Quarry; 2006-03-07 to current/open; source msha-controller-operator-history