# Relationship history for MSHA mine 0100850

Current hierarchy: **Thorne Jack → Florence Port Inc → No 2 Pit 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:** Florence Port Inc → No 2 Pit Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thorne Jack → No 2 Pit Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorne Jack → Florence Port Inc; 1950-01-01 to current/open; source msha-controller-operator-history