# Relationship history for MSHA mine 4703779

Current hierarchy: **Jerad  De Boer; Dan  De Boer → Earth, Inc. → Earth #446**

- 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:** Dan  De Boer → Earth #446; 2001-05-01 to 2023-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Earth, Inc. → Earth #446; 2016-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  De Boer → Earth, Inc.; 2016-05-09 to 2023-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Jerad  De Boer et al → Earth #446; 2023-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerad  De Boer et al → Earth, Inc.; 2023-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  De Boer et al → Earth, Inc.; 2023-03-01 to current/open; source msha-controller-operator-history