# Relationship history for MSHA mine 1513517

Current hierarchy: **Jarvis Ronald A → Ron & Claudia Coal Sales Inc → Maytaig Prep Plant**

- 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:** Ron & Claudia Coal Sales Inc → Maytaig Prep Plant; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jarvis Ronald A → Maytaig Prep Plant; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jarvis Ronald A → Ron & Claudia Coal Sales Inc; 1982-05-01 to current/open; source msha-controller-operator-history