# Relationship history for MSHA mine 3200860

Current hierarchy: **John W  Ell → Ell Dirt Works LLC. → Portable Jaw #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:** Ell Dirt Works LLC. → Portable Jaw #1; 2010-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John W  Ell → Portable Jaw #1; 2010-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Ell → Ell Dirt Works LLC.; 2010-05-03 to current/open; source msha-controller-operator-history