# Relationship history for MSHA mine 4300658

Current hierarchy: **Ken G  Abbott → Ken & Marge Abbott → Route 7 Pit**

- 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:** Ken & Marge Abbott → Route 7 Pit; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ken G  Abbott → Route 7 Pit; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ken G  Abbott → Ken & Marge Abbott; 2006-11-13 to current/open; source msha-controller-operator-history