# Relationship history for MSHA mine 3304604

Current hierarchy: **Dennis R  Brunk; Michael J  Brunk → Brunk Excavating Inc. → Brunk Excavating 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:** Blevins Trucking & Materials Inc → Brunk Excavating Inc; 2008-02-27 to 2014-07-13; source msha-controller-operator-history
- **controller_controls_mine:** James R  Blevins → Brunk Excavating Inc; 2008-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Blevins → Blevins Trucking & Materials Inc; 2008-02-27 to 2014-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Brunk Excavating Inc. → Brunk Excavating Inc; 2014-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael J  Brunk et al → Brunk Excavating Inc; 2014-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Brunk et al → Brunk Excavating Inc.; 2014-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis R  Brunk et al → Brunk Excavating Inc.; 2014-07-14 to current/open; source msha-controller-operator-history