# Relationship history for MSHA mine 3901562

Current hierarchy: **Trent A  Pulis; Thomas J  Farrar → Farrar-Pulis LLC → Farrar-Pulis Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Farrar-Pulis LLC → Farrar-Pulis Sand & Gravel; 2010-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trent A  Pulis et al → Farrar-Pulis Sand & Gravel; 2010-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trent A  Pulis et al → Farrar-Pulis LLC; 2010-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Farrar et al → Farrar-Pulis LLC; 2010-08-01 to current/open; source msha-controller-operator-history