# Relationship history for MSHA mine 0505054

Current hierarchy: **Prowers Holding Company, LLC → Prowers Aggregate Operators, LLC → West Farm Pit-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 → West Farm Pit-Crusher; 2014-01-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crossfire Aggregate Services LLC → West Farm Pit-Crusher; 2015-12-07 to 2016-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Ezra Eldon Lee → Crossfire Aggregate Services LLC; 2015-12-07 to 2016-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Prowers Aggregate Operators, LLC → West Farm Pit-Crusher; 2016-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Prowers Holding Company, LLC → West Farm Pit-Crusher; 2016-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Prowers Holding Company, LLC → Prowers Aggregate Operators, LLC; 2016-07-29 to current/open; source msha-controller-operator-history