# Relationship history for MSHA mine 1103174

Current hierarchy: **Susan  Ritchie → Ritchie Quarry, LLC → Ritchie Quarry, 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:** Ritchie Quarry, LLC → Ritchie Quarry, LLC; 2007-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Ritchie → Ritchie Quarry, LLC; 2007-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Ritchie → Ritchie Quarry, LLC; 2007-04-19 to current/open; source msha-controller-operator-history