# Relationship history for MSHA mine 4105790

Current hierarchy: **Travis Materials Group Ltd; Myles  Weynand; Julie  Melnicki; Brad  Wolff → Travis Materials East Central - Ellinger → Baca Road**

- 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:** Travis Materials East Central - Ellinger → Baca Road; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Julie  Melnicki et al → Baca Road; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Julie  Melnicki et al → Travis Materials East Central - Ellinger; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Myles  Weynand et al → Travis Materials East Central - Ellinger; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Wolff et al → Travis Materials East Central - Ellinger; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis Materials Group Ltd et al → Travis Materials East Central - Ellinger; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Weynand et al → Travis Materials East Central - Ellinger; 2025-02-10 to current/open; source msha-controller-operator-history