# Relationship history for MSHA mine 1513206

Current hierarchy: **Elliot Wayne → Elliot & Terrel Coal Company → No 1 Mine**

- 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:** Elliot & Terrel Coal Company → No 1 Mine; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elliot Wayne → No 1 Mine; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliot Wayne → Elliot & Terrel Coal Company; 1981-11-01 to current/open; source msha-controller-operator-history