# Relationship history for MSHA mine 3607936

Current hierarchy: **Louis J  Beltrami → Booty'S Corp → International Filter Media**

- 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:** Beltrami Brothers Real Estate → International Filter Media; 1987-09-01 to 1996-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Beltrami Louis J Jr & Michael → International Filter Media; 1987-09-01 to 1996-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Beltrami Louis J Jr & Michael → Beltrami Brothers Real Estate; 1987-09-01 to 1996-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Booty'S Corp → International Filter Media; 1996-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Louis J  Beltrami → International Filter Media; 1996-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Beltrami → Booty'S Corp; 1996-01-06 to current/open; source msha-controller-operator-history