# Relationship history for MSHA mine 1519638

Current hierarchy: **Edward L Clemons Estate → Locust Grove, Inc. → Ben's Branch Mine**

- 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

- **controller_controls_mine:** Edward L Clemons Estate → Ben's Branch Mine; 1984-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Locust Grove, Inc. → Ben's Branch Mine; 2011-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate → Locust Grove, Inc.; 2011-11-16 to current/open; source msha-controller-operator-history