# Relationship history for MSHA mine 4703303

Current hierarchy: **John  Warner → Blue Stone Sand and Gravel LLC → Blue Stone Sand and 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Riteway Gravel Company LLC → Blue Stone Sand and Gravel LLC; 2002-04-23 to 2021-06-16; source msha-controller-operator-history
- **controller_controls_mine:** James E  London et al → Blue Stone Sand and Gravel LLC; 2002-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  London et al → Riteway Gravel Company LLC; 2002-04-23 to 2021-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Blue Stone Sand and Gravel LLC → Blue Stone Sand and Gravel LLC; 2021-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Warner → Blue Stone Sand and Gravel LLC; 2021-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Warner → Blue Stone Sand and Gravel LLC; 2021-06-17 to current/open; source msha-controller-operator-history