# Relationship history for MSHA mine 1202209

Current hierarchy: **Jon  Sargent → Junction Limestone Inc → Uland Quarry**

- 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:** Junction Limestone Inc → Uland Quarry; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jon  Sargent → Uland Quarry; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Sargent → Junction Limestone Inc; 1997-03-01 to current/open; source msha-controller-operator-history