# Relationship history for MSHA mine 1800817

Current hierarchy: **Faith  Ritchie; Jody L Ritchie → RITCHIE TRUCKING & EXCAVATING INC → SAND BANK 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Jody L  Ritchie → SAND BANK QUARRY; 2003-05-27 to 2022-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Jody L Ritchie et al → SAND BANK QUARRY; 2022-03-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ritchie Trucking & Excavating Inc → SAND BANK QUARRY; 2022-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jody L  Ritchie → Ritchie Trucking & Excavating Inc; 2022-05-19 to 2022-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Jody L Ritchie et al → Ritchie Trucking & Excavating Inc; 2022-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Faith  Ritchie et al → Ritchie Trucking & Excavating Inc; 2022-05-19 to current/open; source msha-controller-operator-history