# Relationship history for MSHA mine 4608729

Current hierarchy: **Robinson Allen D → Romac Inc → Cherry Knoll No 2 (1)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Romac Inc → Cherry Knoll No 2 (1); 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robinson Allen D → Cherry Knoll No 2 (1); 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robinson Allen D → Romac Inc; 1998-08-01 to current/open; source msha-controller-operator-history