# Relationship history for MSHA mine 0800955

Current hierarchy: **Boose William R Iii → W R Boose Iii → Port Mayaca Lake Estates Excavation 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Vecellio Group Inc → Port Mayaca Lake Estates Excavation Site; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ranger Construction Industries Inc → Port Mayaca Lake Estates Excavation Site; 1980-04-01 to 1983-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Vecellio Group Inc → Ranger Construction Industries Inc; 1980-04-01 to 1983-07-31; source msha-controller-operator-history
- **operator_operates_mine:** W R Boose Iii → Port Mayaca Lake Estates Excavation Site; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boose William R Iii Et Al → Port Mayaca Lake Estates Excavation Site; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boose William R Iii Et Al → W R Boose Iii; 1983-08-01 to current/open; source msha-controller-operator-history