# Relationship history for MSHA mine 1513588

Current hierarchy: **Evans John → John Evans Excavating → Arkle Crossing**

- 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:** John Evans Excavating → Arkle Crossing; 1982-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Evans John → Arkle Crossing; 1982-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Evans John → John Evans Excavating; 1982-07-01 to current/open; source msha-controller-operator-history