# Relationship history for MSHA mine 4700094

Current hierarchy: **M10 Inc → Michels Road & Stone, Inc. → Wisconsin Rose Red**

- 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:** Lake Wausau Granite Company → Wisconsin Rose Red; 1950-01-01 to 1997-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Leon E  Sahr → Wisconsin Rose Red; 1950-01-01 to 1997-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Leon E  Sahr → Lake Wausau Granite Company; 1950-01-01 to 1997-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Michels Corporation → Wisconsin Rose Red; 1996-06-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Michels Corporation → Wisconsin Rose Red; 1997-03-24 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → Michels Corporation; 1997-03-24 to 2021-10-31; source msha-controller-operator-history
- **operator_operates_mine:** MICHELS ROAD & STONE, INC → Wisconsin Rose Red; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** M10 Inc → Wisconsin Rose Red; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M10 Inc → MICHELS ROAD & STONE, INC; 2021-11-01 to current/open; source msha-controller-operator-history