# Relationship history for MSHA mine 2700377

Current hierarchy: **Carl F  Piontkowski → Piontkowski Enterprises, LLC. → High Street 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

- **controller_controls_mine:** Carl F  Piontkowski → High Street Pit; 2001-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Piontkowski Enterprises, LLC. → High Street Pit; 2002-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl F  Piontkowski → Piontkowski Enterprises, LLC.; 2002-06-13 to current/open; source msha-controller-operator-history