# Relationship history for MSHA mine 4002598

Current hierarchy: **Blevins Ike Jr → Blevins Ditching Inc → B-6**

- 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:** Blevins Ditching Inc → B-6; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blevins Ike Jr → B-6; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blevins Ike Jr → Blevins Ditching Inc; 1980-02-01 to current/open; source msha-controller-operator-history