# Relationship history for MSHA mine 3503928

Current hierarchy: **Josh  La Franchi → Ron's Oil Co. → Parrish1**

- 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

- **operator_operates_mine:** Ron's Oil Co. → Parrish1; 2022-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Josh  La Franchi → Parrish1; 2022-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Josh  La Franchi → Ron's Oil Co.; 2022-01-17 to current/open; source msha-controller-operator-history