# Relationship history for MSHA mine 1102963

Current hierarchy: **Wayne  Klinger → Northern Illinois Service Company → Northern IL Service Co Portable Mine #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Northern Illinois Service Company → Northern IL Service Co Portable Mine #1; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Klinger → Northern IL Service Co Portable Mine #1; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Klinger → Northern Illinois Service Company; 1994-05-01 to current/open; source msha-controller-operator-history