# Relationship history for MSHA mine 4300210

Current hierarchy: **Emile J Paquette → Paquette Excavating Inc → BRISTOL SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** L R Booska Corp → BRISTOL SAND & GRAVEL; 1950-01-01 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Booska → BRISTOL SAND & GRAVEL; 1950-01-01 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Booska → L R Booska Corp; 1950-01-01 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Emile J Paquette → BRISTOL SAND & GRAVEL; 1983-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paquette Excavating Inc → BRISTOL SAND & GRAVEL; 1988-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Emile J Paquette → Paquette Excavating Inc; 1988-06-29 to current/open; source msha-controller-operator-history