# Relationship history for MSHA mine 4605937

Current hierarchy: **Taywood Minerals & Noble Affiliates → K I M Coal Corp → No 1 Surface**

- 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

- **operator_operates_mine:** K I M Coal Corp → No 1 Surface; 1978-12-01 to 1979-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Copley Ira → No 1 Surface; 1978-12-01 to 1979-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Copley Ira → K I M Coal Corp; 1978-12-01 to 1979-07-15; source msha-controller-operator-history
- **operator_operates_mine:** K I M Coal Corp → No 1 Surface; 1979-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taywood Minerals & Noble Affiliates → No 1 Surface; 1979-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taywood Minerals & Noble Affiliates → K I M Coal Corp; 1979-07-16 to current/open; source msha-controller-operator-history