# Relationship history for MSHA mine 2103210

Current hierarchy: **Timothy W Mueller; Mori D Willemsen; Brian  Droege → Wm. Mueller & Sons, Inc. → Union Trail**

- 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

- **controller_controls_mine:** Brad G Droege Et Al → Union Trail; 1950-01-01 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Kemnitz Sand & Gravel Inc → Union Trail; 1999-07-01 to 2014-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Kemnitz → Union Trail; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Kemnitz → Kemnitz Sand & Gravel Inc; 1999-07-01 to 2014-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Union Trail Aggregates LLC → Union Trail; 2014-06-27 to 2024-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery  Johnson et al → Union Trail; 2014-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery  Johnson et al → Union Trail Aggregates LLC; 2014-06-27 to 2024-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Johnson et al → Union Trail Aggregates LLC; 2014-06-27 to 2024-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Mori D Willemsen et al → Union Trail; 2022-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wm. Mueller & Sons, Inc. → Union Trail; 2024-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mori D Willemsen et al → Wm. Mueller & Sons, Inc.; 2024-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Droege et al → Wm. Mueller & Sons, Inc.; 2024-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy W Mueller et al → Wm. Mueller & Sons, Inc.; 2024-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad G Droege Et Al → Wm. Mueller & Sons, Inc.; 2024-02-16 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Mueller et al → Wm. Mueller & Sons, Inc.; 2024-02-16 to 2021-12-31; source msha-controller-operator-history