# Relationship history for MSHA mine 0504964

Current hierarchy: **Bruce E.  Neil → Neil's Excavation & Gen Contracting, Inc → Pioneer 4**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Bruce E.  Neil et al → Pioneer 4; 2006-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Neil's Excavation & Gen Contracting, Inc → Pioneer 4; 2010-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce E.  Neil et al → Neil's Excavation & Gen Contracting, Inc; 2010-07-13 to current/open; source msha-controller-operator-history