# Relationship history for MSHA mine 1700769

Current hierarchy: **Ronald I  Crawford III → RC CONSTRUCTION → CRAWFORD 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** RC CONSTRUCTION → CRAWFORD PIT; 2004-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald I  Crawford III → CRAWFORD PIT; 2004-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald I  Crawford III → RC CONSTRUCTION; 2004-08-10 to current/open; source msha-controller-operator-history