# Relationship history for MSHA mine 4503358

Current hierarchy: **Gordon  Pogorelc → Rock Services Inc → PLANT A**

- 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:** Gordon  Pogorelc Et Al → PLANT A; 1994-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rock Services Inc → PLANT A; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Pogorelc Et Al → Rock Services Inc; 1997-03-01 to current/open; source msha-controller-operator-history