# Relationship history for MSHA mine 4605664

Current hierarchy: **International Industries Inc → Lynn Land Company → Skillet Surface**

- 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:** International Industries Inc → Skillet Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lynn Land Company → Skillet Surface; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Industries Inc → Lynn Land Company; 1977-10-01 to current/open; source msha-controller-operator-history