# Relationship history for MSHA mine 3608444

Current hierarchy: **Crack Frederick G → Coal Factors Inc → Lattimer Basin**

- 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:** Coal Factors Inc → Lattimer Basin; 1993-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crack Frederick G → Lattimer Basin; 1993-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crack Frederick G → Coal Factors Inc; 1993-12-01 to current/open; source msha-controller-operator-history