# Relationship history for MSHA mine 2001951

Current hierarchy: **Rod  Van Erp → Central Stone & Gravel Llc → CENTRAL STONE & GRAVEL 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Brade Ready Mix Concrete Inc → CENTRAL STONE & GRAVEL LLC; 1950-01-01 to 2000-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Donald M  Brade → CENTRAL STONE & GRAVEL LLC; 1950-01-01 to 2000-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Donald M  Brade → Brade Ready Mix Concrete Inc; 1950-01-01 to 2000-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Central Stone & Gravel Llc → CENTRAL STONE & GRAVEL LLC; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rod  Van Erp  et al → CENTRAL STONE & GRAVEL LLC; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rod  Van Erp  et al → Central Stone & Gravel Llc; 2000-04-01 to current/open; source msha-controller-operator-history