# Relationship history for MSHA mine 4300654

Current hierarchy: **Matthew  Leach → LEACH FAMILY INC → BERKSHIRE 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

- **controller_controls_mine:** Howard L  Leach → BERKSHIRE PIT; 1999-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leach Family Inc → BERKSHIRE PIT; 2006-10-04 to 2018-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Howard L  Leach → Leach Family Inc; 2006-10-04 to 2018-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Leach Family Inc → BERKSHIRE PIT; 2018-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Leach → BERKSHIRE PIT; 2018-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Leach → Leach Family Inc; 2018-10-16 to current/open; source msha-controller-operator-history