# Relationship history for MSHA mine 0505187

Current hierarchy: **John  Gilleland → C & J Gravel Products, Inc. → 400 Patriot**

- 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:** John  Gilleland → 400 Patriot; 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & J Gravel Products, Inc. → 400 Patriot; 2024-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Gilleland → C & J Gravel Products, Inc.; 2024-02-15 to current/open; source msha-controller-operator-history