# Relationship history for MSHA mine 4602297

Current hierarchy: **Daniel James R → Standard Pocahontas Coal Corp → Pluto 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:** White Ridge Coal Co Inc → Pluto No 1 Surface; 1950-01-01 to 1978-10-19; source msha-controller-operator-history
- **controller_controls_mine:** T W Oil Inc → Pluto No 1 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** T W Oil Inc → White Ridge Coal Co Inc; 1950-01-01 to 1978-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Standard Pocahontas Coal Corp → Pluto No 1 Surface; 1978-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel James R → Pluto No 1 Surface; 1978-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel James R → Standard Pocahontas Coal Corp; 1978-10-20 to current/open; source msha-controller-operator-history