# Relationship history for MSHA mine 2003132

Current hierarchy: **Margaret  Jahr → JAHR INC → JAHR-M-20 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Jahr Inc → JAHR-M-20 PIT; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margaret  Jahr → JAHR-M-20 PIT; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret  Jahr → Jahr Inc; 1999-07-01 to current/open; source msha-controller-operator-history