# Relationship history for MSHA mine 4606930

Current hierarchy: **Randy R  Triplett → Five Brothers Construction Company Inc → Hayhurst Site**

- 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:** Five Brothers Construction Company Inc → Hayhurst Site; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy R  Triplett et al → Hayhurst Site; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy R  Triplett et al → Five Brothers Construction Company Inc; 1985-05-01 to current/open; source msha-controller-operator-history