# Relationship history for MSHA mine 1103307

Current hierarchy: **Mark  Marquis → Marquis Concrete & Stone → Marquis KPI Wash Plant**

- 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:** Marquis Concrete & Stone → Marquis KPI Wash Plant; 2023-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Marquis → Marquis KPI Wash Plant; 2023-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Marquis → Marquis Concrete & Stone; 2023-04-13 to current/open; source msha-controller-operator-history