# Relationship history for MSHA mine 1509495

Current hierarchy: **Lewis James E → Black Mountain Coal Company Inc → 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

- **operator_operates_mine:** Long Branch Collieries Inc → No 1; 1976-01-20 to 1977-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Childers Jack & John Eversole → No 1; 1976-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childers Jack & John Eversole → Long Branch Collieries Inc; 1976-01-20 to 1977-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Coal Company Inc → No 1; 1977-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lewis James E → No 1; 1977-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis James E → Black Mountain Coal Company Inc; 1977-09-16 to current/open; source msha-controller-operator-history