# Relationship history for MSHA mine 1601507

Current hierarchy: **Bernard C  LaBouef → Lafayette Materials → Maurice Sand Pit**

- 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:** Kimble J  Trahan → Maurice Sand Pit; 1996-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vermilion Shell & Limestone Co., Inc. → Maurice Sand Pit; 2011-01-10 to 2025-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Kimble J  Trahan → Vermilion Shell & Limestone Co., Inc.; 2011-01-10 to 2025-12-15; source msha-controller-operator-history
- **operator_operates_mine:** Lafayette Materials → Maurice Sand Pit; 2025-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bernard C  LaBouef → Maurice Sand Pit; 2025-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernard C  LaBouef → Lafayette Materials; 2025-12-16 to current/open; source msha-controller-operator-history