# Relationship history for MSHA mine 4300701

Current hierarchy: **David M  Chaves → David Chaves Excavating, Inc. → Chaves Arlington Gravel 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

- **controller_controls_mine:** David M  Chaves → Chaves Arlington Gravel Pit; 2001-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** David Chaves Excavating, Inc. → Chaves Arlington Gravel Pit; 2009-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M  Chaves → David Chaves Excavating, Inc.; 2009-03-01 to current/open; source msha-controller-operator-history