# Relationship history for MSHA mine 1519414

Current hierarchy: **Bee  Handshoe → B & K Coal Inc → #3**

- 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:** Bee  Handshoe → #3; 2008-03-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & K Coal Inc → #3; 2009-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bee  Handshoe → B & K Coal Inc; 2009-06-01 to current/open; source msha-controller-operator-history