# Relationship history for MSHA mine 4407337

Current hierarchy: **John B  Burgess → Burgess Hauling & Excavating, Inc. → RR Burgess**

- 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:** Burgess Hauling & Excavating, Inc. → RR Burgess; 2015-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John B  Burgess → RR Burgess; 2015-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B  Burgess → Burgess Hauling & Excavating, Inc.; 2015-03-17 to current/open; source msha-controller-operator-history