# Relationship history for MSHA mine 0505017

Current hierarchy: **Ezra Eldon Lee → Crossfire Aggregate Services LLC → Impact Crusher**

- 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:** Ezra Eldon Lee → Impact Crusher; 2012-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crossfire LLC → Impact Crusher; 2013-06-18 to 2014-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Ezra Eldon Lee → Crossfire LLC; 2013-06-18 to 2014-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Crossfire Aggregate Services LLC → Impact Crusher; 2014-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ezra Eldon Lee → Impact Crusher; 2014-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ezra Eldon Lee → Crossfire Aggregate Services LLC; 2014-01-13 to current/open; source msha-controller-operator-history