# Relationship history for MSHA mine 3605491

Current hierarchy: **Falzone Louis → Colt Coal Company Inc → Taylor Fine Coal 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:** Colt Coal Company Inc → Taylor Fine Coal Plant; 1975-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Falzone Louis → Taylor Fine Coal Plant; 1975-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Falzone Louis → Colt Coal Company Inc; 1975-03-01 to current/open; source msha-controller-operator-history