# Relationship history for MSHA mine 1800760

Current hierarchy: **Faith  Ritchie; Jody L Ritchie → Ritchie Trucking & Excavating, Inc. → Sand Bank**

- 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 Trucking & Excavating, Inc. → Sand Bank; 2003-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jody L  Ritchie → Sand Bank; 2003-05-27 to 2022-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Jody L  Ritchie → Ritchie Trucking & Excavating, Inc.; 2003-05-27 to 2022-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Faith  Ritchie et al → Sand Bank; 2022-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Faith  Ritchie et al → Ritchie Trucking & Excavating, Inc.; 2022-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jody L Ritchie et al → Ritchie Trucking & Excavating, Inc.; 2022-03-17 to current/open; source msha-controller-operator-history