# Relationship history for MSHA mine 3304734

Current hierarchy: **Angie  McDorman → S & J Excavating LLC → Iberia 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:** S & J Excavating LLC → Iberia Quarry; 2017-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angie  McDorman → Iberia Quarry; 2017-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angie  McDorman → S & J Excavating LLC; 2017-03-23 to current/open; source msha-controller-operator-history