# Relationship history for MSHA mine 3200794

Current hierarchy: **David  Maley → Maley Construction → Crushing Unit #1**

- 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:** Maley Construction → Crushing Unit #1; 2002-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Maley → Crushing Unit #1; 2002-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Maley → Maley Construction; 2002-01-26 to current/open; source msha-controller-operator-history