# Relationship history for MSHA mine 1401764

Current hierarchy: **Chad  Eakin → Eakin Enterprises Inc. → Ark River Sand Co. Inc.**

- 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:** Eakin Enterprises Inc. → Ark River Sand Co. Inc.; 2013-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chad  Eakin → Ark River Sand Co. Inc.; 2013-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Eakin → Eakin Enterprises Inc.; 2013-06-12 to current/open; source msha-controller-operator-history