# Relationship history for MSHA mine 0501840

Current hierarchy: **Garrett  Varra; Pasquale  Varra → Varra Companies, Inc. → 117 DP**

- 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

- **operator_operates_mine:** Denver Brick & Pipe Company → 117 DP; 1950-01-01 to 1985-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Croke → 117 DP; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Croke → Denver Brick & Pipe Company; 1950-01-01 to 1985-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Garrett  Varra et al → 117 DP; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Varra Companies, Inc. → 117 DP; 1985-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garrett  Varra et al → Varra Companies, Inc.; 1985-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pasquale  Varra et al → Varra Companies, Inc.; 1985-04-15 to current/open; source msha-controller-operator-history