# Relationship history for MSHA mine 2002769

Current hierarchy: **Gerald L  Gravedoni; John F  Poquette → Poquette Leasing Company Inc → BELLS BAY SHALE 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:** Poquette Leasing Company Inc → BELLS BAY SHALE PIT; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William R Poquette → BELLS BAY SHALE PIT; 1986-11-01 to 2006-05-15; source msha-controller-operator-history
- **controller_controls_operator:** William R Poquette → Poquette Leasing Company Inc; 1986-11-01 to 2006-05-15; source msha-controller-operator-history
- **controller_controls_mine:** John F  Poquette et al → BELLS BAY SHALE PIT; 2006-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John F  Poquette et al → Poquette Leasing Company Inc; 2006-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald L  Gravedoni et al → Poquette Leasing Company Inc; 2006-05-16 to current/open; source msha-controller-operator-history