# Relationship history for MSHA mine 4102775

Current hierarchy: **Le Blanc Dudley → Le Blanc'S Concrete & Mortar Sand Company → Dudley'S 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

- **operator_operates_mine:** Jaramillo Trucking → Dudley'S Pit; 1978-03-09 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Jaramillo Gonzalo Jr → Dudley'S Pit; 1978-03-09 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Jaramillo Gonzalo Jr → Jaramillo Trucking; 1978-03-09 to 1984-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Le Blanc'S Concrete & Mortar Sand Company → Dudley'S Pit; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Le Blanc Dudley → Dudley'S Pit; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Le Blanc Dudley → Le Blanc'S Concrete & Mortar Sand Company; 1984-05-15 to current/open; source msha-controller-operator-history