# Relationship history for MSHA mine 4300804

Current hierarchy: **David C Camara → VT Unfading Green Slate Company Inc. → Camera Crusher**

- 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:** David C Camara et al → Camera Crusher; 1986-11-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** VT Unfading Green Slate Company Inc. → Camera Crusher; 2020-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C Camara et al → VT Unfading Green Slate Company Inc.; 2020-08-15 to current/open; source msha-controller-operator-history