# Relationship history for MSHA mine 1511202

Current hierarchy: **Allen Sam-Paul & James → Allen Brothers Construction Company → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Allen Brothers Construction Company → No 1 Surface; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen Sam-Paul & James Et Al → No 1 Surface; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen Sam-Paul & James Et Al → Allen Brothers Construction Company; 1978-04-01 to current/open; source msha-controller-operator-history