# Relationship history for MSHA mine 3002327

Current hierarchy: **Bushey Raymond R → Raymond R Bushey Inc → Shelters Pit**

- 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:** Kenneth Chauvin Trucking → Shelters Pit; 1978-03-09 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Chauvin Kenneth → Shelters Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chauvin Kenneth → Kenneth Chauvin Trucking; 1978-03-09 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Raymond R Bushey Inc → Shelters Pit; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bushey Raymond R → Shelters Pit; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bushey Raymond R → Raymond R Bushey Inc; 1981-09-15 to current/open; source msha-controller-operator-history