# Relationship history for MSHA mine 4403533

Current hierarchy: **Italcementi Spa → Riverton Corp → Paris Quarry**

- 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:** Riverton Corp → Paris Quarry; 1950-01-01 to 1983-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Investment Corp Of Florida → Paris Quarry; 1950-01-01 to 1983-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Investment Corp Of Florida → Riverton Corp; 1950-01-01 to 1983-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Capitol Materials Corporation → Paris Quarry; 1980-11-01 to 2002-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Riverton Corp → Paris Quarry; 1983-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Capitol Materials Corporation → Riverton Corp; 1983-11-28 to 2002-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Italcementi Spa → Paris Quarry; 2002-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Italcementi Spa → Riverton Corp; 2002-05-21 to current/open; source msha-controller-operator-history