# Relationship history for MSHA mine 3001683

Current hierarchy: **Harold  Lyons → Harold Lyons & Sons Inc → Wood Avenue Gravel Bank**

- 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:** Harold Lyons & Sons Inc → Wood Avenue Gravel Bank; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold  Lyons et al → Wood Avenue Gravel Bank; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Lyons et al → Harold Lyons & Sons Inc; 1950-01-01 to current/open; source msha-controller-operator-history