# Relationship history for MSHA mine 4300415

Current hierarchy: **David C Camara → Vermont Unfading Green Slate Inc. → Green MT Mine**

- 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 → Green MT Mine; 1986-11-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & B Slate Company Inc → Green MT Mine; 1987-08-01 to 1987-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Clark → Green MT Mine; 1987-08-01 to 1987-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Clark → C & B Slate Company Inc; 1987-08-01 to 1987-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Vermont Unfading Green Slate Inc. → Green MT Mine; 1987-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C Camara et al → Vermont Unfading Green Slate Inc.; 1987-10-30 to current/open; source msha-controller-operator-history