# Relationship history for MSHA mine 4703155

Current hierarchy: **M10 Inc → Michels Road & Stone, Inc. → Hayton Quarry**

- 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:** Roger R  Glawe → Hayton Quarry; 1985-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michels Corporation → Hayton Quarry; 1996-06-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Specification Stone Products Inc → Hayton Quarry; 1998-07-01 to 2008-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Roger R  Glawe → Specification Stone Products Inc; 1998-07-01 to 2008-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Anderson Bros & Johnson → Hayton Quarry; 2008-05-06 to 2018-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Michels Corporation → Hayton Quarry; 2008-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → Anderson Bros & Johnson; 2008-05-06 to 2018-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Michels Corporation → Hayton Quarry; 2018-01-05 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → Michels Corporation; 2018-01-05 to 2021-10-31; source msha-controller-operator-history
- **operator_operates_mine:** MICHELS ROAD & STONE, INC → Hayton Quarry; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** M10 Inc → Hayton Quarry; 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