# Relationship history for MSHA mine 0600659

Current hierarchy: **Patrick S  Milardo → M L & P Trucking Llc → DOROTHY C. HAY 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

- **operator_operates_mine:** M L & P Trucking Llc → DOROTHY C. HAY PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick S  Milardo → DOROTHY C. HAY PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick S  Milardo → M L & P Trucking Llc; 1997-08-01 to current/open; source msha-controller-operator-history