# Relationship history for MSHA mine 2103318

Current hierarchy: **Rick  Penz → Fraser Construction → Port #2**

- 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:** Rick  Penz → Port #2; 2000-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fraser Construction → Port #2; 2002-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Penz → Fraser Construction; 2002-05-07 to current/open; source msha-controller-operator-history