# Relationship history for MSHA mine 4300647

Current hierarchy: **Douglas R  Casella → Casella Construction Inc → Erin Screen 7084**

- 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

- **controller_controls_mine:** Douglas R  Casella → Erin Screen 7084; 1998-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casella Construction Inc → Erin Screen 7084; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas R  Casella → Casella Construction Inc; 2006-05-01 to current/open; source msha-controller-operator-history