# Relationship history for MSHA mine 0504042

Current hierarchy: **Garrett  Varra; Pasquale  Varra → Varra Companies Inc → 408 PTS**

- 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:** Pasquale  Varra et al → 408 PTS; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & M Sand & Gravel → 408 PTS; 1985-05-01 to 1998-11-16; source msha-controller-operator-history
- **controller_controls_mine:** Michael D  Miller → 408 PTS; 1985-05-01 to 1998-11-16; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Miller → M & M Sand & Gravel; 1985-05-01 to 1998-11-16; source msha-controller-operator-history
- **operator_operates_mine:** Varra Companies Inc → 408 PTS; 1998-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pasquale  Varra et al → Varra Companies Inc; 1998-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garrett  Varra et al → Varra Companies Inc; 1998-11-17 to current/open; source msha-controller-operator-history