# Relationship history for MSHA mine 1518406

Current hierarchy: **James  Parsons → J & L Drilling Inc → J & L Drilling Mine #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** J & L Drilling Inc → J & L Drilling Mine #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Parsons → J & L Drilling Mine #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Parsons → J & L Drilling Inc; 2001-07-01 to current/open; source msha-controller-operator-history