# Relationship history for MSHA mine 0202142

Current hierarchy: **Jackson Andrew S → Kachina Redi-Mix → Kachina Plant #4**

- 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:** Kachina Redi-Mix → Kachina Plant #4; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Andrew S → Kachina Plant #4; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Andrew S → Kachina Redi-Mix; 1983-03-01 to current/open; source msha-controller-operator-history