# Relationship history for MSHA mine 2003623

Current hierarchy: **Gary J  Hoppa → Oakridge Excavating, LLC → The 120 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:** Oakridge Excavating, LLC → The 120 Pit; 2021-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary J  Hoppa → The 120 Pit; 2021-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary J  Hoppa → Oakridge Excavating, LLC; 2021-09-23 to current/open; source msha-controller-operator-history