# Relationship history for MSHA mine 2400890

Current hierarchy: **Kramer James D → Tabor Mines & Metals Corp → Nellie Bly And Winnetka Mines**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Kramer James D → Nellie Bly And Winnetka Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clifford E Melroe → Nellie Bly And Winnetka Mines; 1980-05-01 to 1980-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Melroe Clifford E → Nellie Bly And Winnetka Mines; 1980-05-01 to 1980-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Melroe Clifford E → Clifford E Melroe; 1980-05-01 to 1980-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Tabor Mines & Metals Corp → Nellie Bly And Winnetka Mines; 1980-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kramer James D → Tabor Mines & Metals Corp; 1980-10-16 to current/open; source msha-controller-operator-history