# Relationship history for MSHA mine 3604862

Current hierarchy: **Cicconi Attilio → Tri-State Coal Company → Tri-State 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

- **operator_operates_mine:** Tri-State Coal Company → Tri-State Strip; 1973-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cicconi Attilio → Tri-State Strip; 1973-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cicconi Attilio → Tri-State Coal Company; 1973-12-13 to current/open; source msha-controller-operator-history