# Relationship history for MSHA mine 4300395

Current hierarchy: **Verne R Drew → Pompy Farms Crushed Stone Inc → DREW'S 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:** Pompy Farms Crushed Stone Inc → DREW'S PIT; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Verne R Drew → DREW'S PIT; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Verne R Drew → Pompy Farms Crushed Stone Inc; 1985-06-01 to current/open; source msha-controller-operator-history