# Relationship history for MSHA mine 1518062

Current hierarchy: **Jimmy K  Burchett → Bico 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:** Bico Inc → No 1; 1998-06-01 to 2000-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Burchett Noah F → No 1; 1998-06-01 to 2000-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Burchett Noah F → Bico Inc; 1998-06-01 to 2000-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Bico Inc → No 1; 2000-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy K  Burchett → No 1; 2000-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy K  Burchett → Bico Inc; 2000-06-20 to current/open; source msha-controller-operator-history