# Relationship history for MSHA mine 1508262

Current hierarchy: **Allen James L → A B C Developing Company Inc → No 7 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** A B C Developing Company Inc → No 7 Surface; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen James L Et Al → No 7 Surface; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen James L Et Al → A B C Developing Company Inc; 1975-04-01 to current/open; source msha-controller-operator-history