# Relationship history for MSHA mine 4105198

Current hierarchy: **Myles  Weynand; Mike  Weynand → Travis Materials Group, LTD → Webberville Plant**

- 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 Group, LTD → Webberville Plant; 2016-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lamy Mtrls Ltd et al → Webberville Plant; 2016-05-23 to 2016-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Lamy Mtrls Ltd et al → Travis Materials Group, LTD; 2016-05-23 to 2016-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Travis Mtrls Weynand Co Ltd et al → Travis Materials Group, LTD; 2016-05-23 to 2016-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Weynand et al → Webberville Plant; 2016-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Weynand et al → Travis Materials Group, LTD; 2016-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Myles  Weynand et al → Travis Materials Group, LTD; 2016-12-15 to current/open; source msha-controller-operator-history