# Relationship history for MSHA mine 4700054

Current hierarchy: **Dennis  Buechel → FOND DU LAC STONE INC → Fond du Lac Stone, Inc.**

- 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:** Michels Corporation → Fond du Lac Stone, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fond Du Lac Stone Company Inc → Fond du Lac Stone, Inc.; 1950-01-01 to 1997-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Homuth → Fond du Lac Stone, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Homuth → Fond Du Lac Stone Company Inc; 1950-01-01 to 1997-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Michels Corporation → Fond du Lac Stone, Inc.; 1996-06-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Michels Pipeline Construction Inc → Fond du Lac Stone, Inc.; 1997-12-10 to 2002-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → Michels Pipeline Construction Inc; 1997-12-10 to 2002-02-12; source msha-controller-operator-history
- **operator_operates_mine:** MICHELS CORPORATION → Fond du Lac Stone, Inc.; 2002-02-13 to 2017-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → MICHELS CORPORATION; 2002-02-13 to 2017-12-04; source msha-controller-operator-history
- **operator_operates_mine:** FOND DU LAC STONE INC → Fond du Lac Stone, Inc.; 2017-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Buechel → Fond du Lac Stone, Inc.; 2017-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Buechel → FOND DU LAC STONE INC; 2017-12-05 to current/open; source msha-controller-operator-history