# Relationship history for MSHA mine 1901223

Current hierarchy: **Mark  White → D W White Construction Inc → 1265 Main Street**

- 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:** D W White Construction Inc → 1265 Main Street; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  White → 1265 Main Street; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  White → D W White Construction Inc; 2012-03-19 to current/open; source msha-controller-operator-history