# Relationship history for MSHA mine 1504233

Current hierarchy: **Coleman James → Coleman & Tabor Coal Company → No 2-A**

- 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:** Coleman & Tabor Coal Company → No 2-A; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman James → No 2-A; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman James → Coleman & Tabor Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history