# Relationship history for MSHA mine 1901166

Current hierarchy: **Strategic Commercial Realty Inc → Rawson Materials → Rawson Materials Plant # 10**

- 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:** O & G Industries Inc → Rawson Materials Plant # 10; 2001-04-12 to 2025-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Hylka Const. Co. Inc. → Rawson Materials Plant # 10; 2007-06-19 to 2026-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Francis J.  Hylka Jr → Rawson Materials Plant # 10; 2007-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francis J.  Hylka Jr → Hylka Const. Co. Inc.; 2007-06-19 to 2026-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Strategic Commercial Realty Inc → Rawson Materials Plant # 10; 2025-04-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rawson Materials → Rawson Materials Plant # 10; 2026-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strategic Commercial Realty Inc → Rawson Materials; 2026-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O & G Industries Inc → Rawson Materials; 2026-01-24 to 2025-04-16; source msha-controller-operator-history