# Relationship history for MSHA mine 1300288

Current hierarchy: **James L  Niemann → Paul Niemann Construction Company → Graham Quarry**

- 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

- **controller_controls_mine:** James L  Niemann → Graham Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fayette County → Graham Quarry; 1950-01-01 to 1983-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Fayette County-IA → Graham Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fayette County-IA → Fayette County; 1950-01-01 to 1983-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Paul Niemann Construction Company → Graham Quarry; 1983-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Niemann → Paul Niemann Construction Company; 1983-08-12 to current/open; source msha-controller-operator-history