# Relationship history for MSHA mine 4300503

Current hierarchy: **David C Camara → VERMONT UNFADING GREEN SLATE INC. → WELLS QUARRY WELLS VT**

- 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

- **controller_controls_mine:** David C Camara et al → WELLS QUARRY WELLS VT; 1986-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Victor  Genier → WELLS QUARRY WELLS VT; 1996-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Genier Slate Inc. → WELLS QUARRY WELLS VT; 1996-12-01 to 2023-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Victor  Genier → Genier Slate Inc.; 1996-12-01 to 2023-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Vermont Unfading Green Slate Inc. → WELLS QUARRY WELLS VT; 2023-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C Camara et al → Vermont Unfading Green Slate Inc.; 2023-07-19 to current/open; source msha-controller-operator-history