# Relationship history for MSHA mine 4201995

Current hierarchy: **Quaker State Corp → Valley Camp Of Utah Inc → Val-Cam Load-Out Facility**

- 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

- **controller_controls_mine:** Quaker State Corp → Val-Cam Load-Out Facility; 1974-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley Camp Of Utah Inc → Val-Cam Load-Out Facility; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quaker State Corp → Valley Camp Of Utah Inc; 1986-11-01 to current/open; source msha-controller-operator-history