# Relationship history for MSHA mine 0405387

Current hierarchy: **Leon  Whitney → Whitney Construction Inc → WHITNEY 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:** Whitney Construction Inc → WHITNEY PIT; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leon  Whitney → WHITNEY PIT; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Whitney → Whitney Construction Inc; 1999-10-01 to current/open; source msha-controller-operator-history