# Relationship history for MSHA mine 0505052

Current hierarchy: **Ezra Eldon Lee → Crossfire Aggregate Services, LLC → Crossfire Front Range Plant #2**

- 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 → Crossfire Front Range Plant #2; 2014-01-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crossfire Aggregate Services, LLC → Crossfire Front Range Plant #2; 2015-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ezra Eldon Lee → Crossfire Aggregate Services, LLC; 2015-10-19 to current/open; source msha-controller-operator-history