# Relationship history for MSHA mine 3605086

Current hierarchy: **Pagnotti Enterprises Inc → Jeddo-Highland Coal Company → Humbolt**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Louis J  Beltrami → Humbolt; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pagnotti Enterprises Inc → Humbolt; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beltrami Enterprises Inc → Humbolt; 1974-01-01 to 1991-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Beltrami → Beltrami Enterprises Inc; 1974-01-01 to 1991-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Jeddo-Highland Coal Company → Humbolt; 1991-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pagnotti Enterprises Inc → Jeddo-Highland Coal Company; 1991-03-22 to current/open; source msha-controller-operator-history