# Relationship history for MSHA mine 2103046

Current hierarchy: **Heath  Line; Kerry  Abramson; Thomas  Kvas; Pauline  Rutchasky → Superior Forrest Aggregates Inc. → Hibbing Pit Wash Plant #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Matt  Seppi → Hibbing Pit Wash Plant #2; 1980-05-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seppi Brothers Concrete  Products Corp → Hibbing Pit Wash Plant #2; 1992-05-01 to 2026-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Seppi → Seppi Brothers Concrete  Products Corp; 1992-05-01 to 2026-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Superior Forrest Aggregates Inc. → Hibbing Pit Wash Plant #2; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pauline  Rutchasky et al → Hibbing Pit Wash Plant #2; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pauline  Rutchasky et al → Superior Forrest Aggregates Inc.; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Kvas et al → Superior Forrest Aggregates Inc.; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Abramson et al → Superior Forrest Aggregates Inc.; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heath  Line et al → Superior Forrest Aggregates Inc.; 2026-02-19 to current/open; source msha-controller-operator-history