# Relationship history for MSHA mine 0503366

Current hierarchy: **State Of Colorado → Colorado Department Of Highways → Blm (North Of Loma)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** State Of Colorado → Blm (North Of Loma); 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Colorado Department Of Highways → Blm (North Of Loma); 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Colorado → Colorado Department Of Highways; 1979-01-01 to current/open; source msha-controller-operator-history