# Relationship history for MSHA mine 0504895

Current hierarchy: **James S  Bartmess → Centennial State Paving, Inc → Pheasant Run Gravel Pit**

- 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:** Centennial State Paving, Inc → Pheasant Run Gravel Pit; 2008-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James S  Bartmess et al → Pheasant Run Gravel Pit; 2008-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James S  Bartmess et al → Centennial State Paving, Inc; 2008-06-18 to current/open; source msha-controller-operator-history