# Relationship history for MSHA mine 1103104

Current hierarchy: **Wayne  Klinger → Northern Illinois Service Co. → Portable #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:** Wayne  Klinger → Portable #2; 1994-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northern Illinois Service Co. → Portable #2; 2002-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Klinger → Northern Illinois Service Co.; 2002-07-24 to current/open; source msha-controller-operator-history