# Relationship history for MSHA mine 0700061

Current hierarchy: **Nick  Ferrara; Vincent  Greggo → Bear Materials-LLC → BEAR MATERIALS LLC**

- 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:** Whittington Sand & Gravel Company Inc → BEAR MATERIALS LLC; 1950-01-01 to 1995-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Whittington → BEAR MATERIALS LLC; 1950-01-01 to 1995-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Whittington → Whittington Sand & Gravel Company Inc; 1950-01-01 to 1995-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Whittington Sand & Gravel Inc → BEAR MATERIALS LLC; 1995-07-20 to 1999-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Whittington → BEAR MATERIALS LLC; 1995-07-20 to 1999-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Whittington → Whittington Sand & Gravel Inc; 1995-07-20 to 1999-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Bear Materials-LLC → BEAR MATERIALS LLC; 1999-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nick  Ferrara  et al → BEAR MATERIALS LLC; 1999-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick  Ferrara  et al → Bear Materials-LLC; 1999-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Greggo  et al → Bear Materials-LLC; 1999-03-23 to current/open; source msha-controller-operator-history