# Relationship history for MSHA mine 3401939

Current hierarchy: **Mike  Van Eaton → Van Eaton Ready Mix, Inc → Guthrie Sand 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:** Cimarron Sand Company LLC → Guthrie Sand Plant; 2004-03-31 to 2010-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Don R  Mc Bride Sr  et al → Guthrie Sand Plant; 2004-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don R  Mc Bride Sr  et al → Cimarron Sand Company LLC; 2004-03-31 to 2010-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Don R  Mc Bride  Jr  et al → Cimarron Sand Company LLC; 2004-03-31 to 2010-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Van Eaton Ready Mix, Inc → Guthrie Sand Plant; 2010-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Van Eaton → Guthrie Sand Plant; 2010-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Van Eaton → Van Eaton Ready Mix, Inc; 2010-04-02 to current/open; source msha-controller-operator-history