# Relationship history for MSHA mine 1601516

Current hierarchy: **Ed  Milner; Robert C  Overall Jr. → Coastal Bridge Co., LLC → Port Allen**

- 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:** Coastal Bridge Co., LLC → Port Allen; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Overall Jr. et al → Port Allen; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Overall Jr. et al → Coastal Bridge Co., LLC; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ed  Milner et al → Coastal Bridge Co., LLC; 2012-01-01 to current/open; source msha-controller-operator-history