# Relationship history for MSHA mine 2103341

Current hierarchy: **Timothy W Mueller; Mori D Willemsen; Brian  Droege → Wm. Mueller & Sons, Inc. → #136 SCREENER**

- 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 → #136 SCREENER; 1950-01-01 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Wm. Mueller & Sons, Inc. → #136 SCREENER; 2003-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad G Droege Et Al → Wm. Mueller & Sons, Inc.; 2003-03-25 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Mueller et al → Wm. Mueller & Sons, Inc.; 2003-03-25 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Timothy W Mueller et al → #136 SCREENER; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy W Mueller et al → Wm. Mueller & Sons, Inc.; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mori D Willemsen et al → Wm. Mueller & Sons, Inc.; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Droege et al → Wm. Mueller & Sons, Inc.; 2022-01-01 to current/open; source msha-controller-operator-history