# Relationship history for MSHA mine 1513148

Current hierarchy: **Hamblin Carl & Tyce → C & H Coal Company → Rex #1**

- 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:** C & H Coal Company → Rex #1; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hamblin Carl & Tyce → Rex #1; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hamblin Carl & Tyce → C & H Coal Company; 1981-11-01 to current/open; source msha-controller-operator-history