# Relationship history for MSHA mine 3605601

Current hierarchy: **Adrian Coal & Coke Inc → Woods Coal Company → Kent Area 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Woods Coal Company → Kent Area Mine; 1950-01-01 to 1979-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Woods Del → Kent Area Mine; 1950-01-01 to 1979-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Woods Del → Woods Coal Company; 1950-01-01 to 1979-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Woods Coal Company → Kent Area Mine; 1979-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adrian Coal & Coke Inc → Kent Area Mine; 1979-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adrian Coal & Coke Inc → Woods Coal Company; 1979-07-12 to current/open; source msha-controller-operator-history