# Relationship history for MSHA mine 0503285

Current hierarchy: **Leone John V → Domenic Leone Construction Company → Blue Heron Estates 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:** Domenic Leone Construction Company → Blue Heron Estates Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leone John V Et Al → Blue Heron Estates Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leone John V Et Al → Domenic Leone Construction Company; 1979-01-01 to current/open; source msha-controller-operator-history