# Relationship history for MSHA mine 2700414

Current hierarchy: **Donald A.  Cheney → Evergreen Const. → Evergreen Valley Const.**

- 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:** Evergreen Const. → Evergreen Valley Const.; 2006-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald A.  Cheney → Evergreen Valley Const.; 2006-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald A.  Cheney → Evergreen Const.; 2006-04-24 to current/open; source msha-controller-operator-history