# Relationship history for MSHA mine 3601113

Current hierarchy: **Berwind Corporation → Berwind Corp - Willmore Division → Eureka 37 Upper Mine**

- 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:** Dalton Run Coal Company → Eureka 37 Upper Mine; 1950-01-01 to 1973-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Kawchak John & Earl Rummel → Eureka 37 Upper Mine; 1950-01-01 to 1973-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kawchak John & Earl Rummel → Dalton Run Coal Company; 1950-01-01 to 1973-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Wilmore Coal Company → Eureka 37 Upper Mine; 1973-07-01 to 1975-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Maloy Richard W → Eureka 37 Upper Mine; 1973-07-01 to 1975-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Maloy Richard W → Wilmore Coal Company; 1973-07-01 to 1975-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Berwind Corp - Willmore Division → Eureka 37 Upper Mine; 1975-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Berwind Corporation → Eureka 37 Upper Mine; 1975-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berwind Corporation → Berwind Corp - Willmore Division; 1975-07-17 to current/open; source msha-controller-operator-history