# Relationship history for MSHA mine 1601355

Current hierarchy: **Joe  Francis; Morris  Francis → Francis Gravel Company Inc → FRANCIS PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Francis Gravel Company Inc → FRANCIS PIT; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Morris  Francis  et al → FRANCIS PIT; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morris  Francis  et al → Francis Gravel Company Inc; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Francis  et al → Francis Gravel Company Inc; 1999-07-01 to current/open; source msha-controller-operator-history