# Relationship history for MSHA mine 3402123

Current hierarchy: **Sheila  Cullum → Cullum Equipment Services, Inc → Hanson Mountain Quarry**

- 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:** Cullum Equipment Services, Inc → Hanson Mountain Quarry; 2012-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sheila  Cullum → Hanson Mountain Quarry; 2012-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sheila  Cullum → Cullum Equipment Services, Inc; 2012-01-10 to current/open; source msha-controller-operator-history