# Relationship history for MSHA mine 3604775

Current hierarchy: **Dimeling William R → Great Eastern Coal Corp → Giza And Oley Rr Bank**

- 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 Enterprises Inc → Giza And Oley Rr Bank; 1950-01-01 to 1977-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Louis J  Beltrami → Giza And Oley Rr Bank; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Beltrami → Beltrami Enterprises Inc; 1950-01-01 to 1977-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Giza & Oley Enterprises → Giza And Oley Rr Bank; 1977-02-01 to 1979-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Lispi Eugene-Raymond Giza Et Al → Giza And Oley Rr Bank; 1977-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lispi Eugene-Raymond Giza Et Al → Giza & Oley Enterprises; 1977-02-01 to 1979-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Dimeling William R → Giza And Oley Rr Bank; 1977-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Great Eastern Coal Corp → Giza And Oley Rr Bank; 1979-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dimeling William R → Great Eastern Coal Corp; 1979-11-06 to current/open; source msha-controller-operator-history