# Relationship history for MSHA mine 4003250

Current hierarchy: **Greg L.  Oakes → Greg Oakes → Chestnut Hill Brown**

- 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:** Greg Oakes → Chestnut Hill Brown; 2005-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg L.  Oakes → Chestnut Hill Brown; 2005-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg L.  Oakes → Greg Oakes; 2005-01-10 to current/open; source msha-controller-operator-history