# Relationship history for MSHA mine 1700811

Current hierarchy: **Mark B  Randall → Bubier Construction Inc → Bubier Construction Inc**

- 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:** Bubier Construction Inc → Bubier Construction Inc; 2006-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark B  Randall → Bubier Construction Inc; 2006-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark B  Randall → Bubier Construction Inc; 2006-12-20 to current/open; source msha-controller-operator-history