# Relationship history for MSHA mine 4503710

Current hierarchy: **John J  Bredfield → LROCK Industries → LROCK 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:** LROCK Industries → LROCK Pit; 2012-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lemmie  Rockford → LROCK Pit; 2012-08-22 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Lemmie  Rockford → LROCK Industries; 2012-08-22 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John J  Bredfield → LROCK Pit; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Bredfield → LROCK Industries; 2025-01-01 to current/open; source msha-controller-operator-history