# Relationship history for MSHA mine 3503856

Current hierarchy: **Jack L  Ingram → W.I. Construction Inc. → Willow Creek 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:** W.I. Construction Inc. → Willow Creek Quarry; 2016-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack L  Ingram → Willow Creek Quarry; 2016-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Ingram → W.I. Construction Inc.; 2016-10-04 to current/open; source msha-controller-operator-history