# Relationship history for MSHA mine 4503565

Current hierarchy: **John T  Crow → Green Crow Rock Products → Green Crow Rock Products-Arlington Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Green Crow Rock Products → Green Crow Rock Products-Arlington Pit; 2004-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randall S  Johnson → Green Crow Rock Products-Arlington Pit; 2004-04-30 to 2016-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Randall S  Johnson → Green Crow Rock Products; 2004-04-30 to 2016-03-06; source msha-controller-operator-history
- **controller_controls_mine:** John T  Crow → Green Crow Rock Products-Arlington Pit; 2016-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John T  Crow → Green Crow Rock Products; 2016-03-07 to current/open; source msha-controller-operator-history