# Relationship history for MSHA mine 4406463

Current hierarchy: **Longworth G Randall → L & J Coal Company Inc → Barts Lick No 1**

- 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:** Ward James T → Barts Lick No 1; 1987-01-16 to 1991-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Ward Brothers Construction Inc → Barts Lick No 1; 1988-06-01 to 1991-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Ward James T → Ward Brothers Construction Inc; 1988-06-01 to 1991-09-10; source msha-controller-operator-history
- **operator_operates_mine:** L & J Coal Company Inc → Barts Lick No 1; 1991-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Longworth G Randall → Barts Lick No 1; 1991-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Longworth G Randall → L & J Coal Company Inc; 1991-09-11 to current/open; source msha-controller-operator-history