# Relationship history for MSHA mine 1103284

Current hierarchy: **Thomas  Kanzler → Earth Inc. → Bartlett Yard**

- 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:** Earth Inc. → Bartlett Yard; 2017-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Kanzler → Bartlett Yard; 2017-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Kanzler → Earth Inc.; 2017-07-13 to current/open; source msha-controller-operator-history