# Relationship history for MSHA mine 4703952

Current hierarchy: **Jeffrey  Rettenmund → Bull Dozin, Inc. → Bulldozin, 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

- **controller_controls_mine:** Jeffrey  Rettenmund → Bulldozin, Inc; 2015-06-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bull Dozin, Inc. → Bulldozin, Inc; 2024-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Rettenmund → Bull Dozin, Inc.; 2024-04-02 to current/open; source msha-controller-operator-history