# Relationship history for MSHA mine 1601479

Current hierarchy: **Richard B  Sanders; Dennis R  Hayes → Bayou Sand & Gravel LLC → Bayou Sand & 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:** Bayou Sand & Gravel LLC → Bayou Sand & Gravel LLC; 2008-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis R  Hayes  et al → Bayou Sand & Gravel LLC; 2008-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis R  Hayes  et al → Bayou Sand & Gravel LLC; 2008-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard B  Sanders  et al → Bayou Sand & Gravel LLC; 2008-07-11 to current/open; source msha-controller-operator-history