# Relationship history for MSHA mine 2401708

Current hierarchy: **White Martin A → Western Energy Company → Edna #1**

- 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:** Kent & Marjma → Edna #1; 1983-02-01 to 1984-11-26; source msha-controller-operator-history
- **controller_controls_mine:** Kent Mike & Joans Marjma → Edna #1; 1983-02-01 to 1984-11-26; source msha-controller-operator-history
- **controller_controls_operator:** Kent Mike & Joans Marjma → Kent & Marjma; 1983-02-01 to 1984-11-26; source msha-controller-operator-history
- **controller_controls_mine:** White Martin A → Edna #1; 1984-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Energy Company → Edna #1; 1984-11-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Martin A → Western Energy Company; 1984-11-27 to current/open; source msha-controller-operator-history