# Relationship history for MSHA mine 3607993

Current hierarchy: **James  Filiaggi → Filiaggi Coal Company → York Run Strip**

- 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:** James  Filiaggi → York Run Strip; 1986-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Filiaggi Coal Company → York Run Strip; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Filiaggi → Filiaggi Coal Company; 1988-03-01 to current/open; source msha-controller-operator-history