# Relationship history for MSHA mine 4400061

Current hierarchy: **Quikrete Holdings Inc. → Boxley Materials Company → Boxley Arvonia 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:** Boxley Materials Co → Boxley Arvonia Quarry; 1950-01-01 to 2016-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Le Sueur-Richmond Slate Corp → Boxley Arvonia Quarry; 1950-01-01 to 1994-12-26; source msha-controller-operator-history
- **controller_controls_mine:** H David  Crummette → Boxley Arvonia Quarry; 1950-01-01 to 1994-12-26; source msha-controller-operator-history
- **controller_controls_operator:** H David  Crummette → Le Sueur-Richmond Slate Corp; 1950-01-01 to 1994-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Le Sueur-Richmond Slate Corp → Boxley Arvonia Quarry; 1994-12-27 to 2008-11-12; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Rose Jr → Boxley Arvonia Quarry; 1994-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Rose Jr → Le Sueur-Richmond Slate Corp; 1994-12-27 to 2008-11-12; source msha-controller-operator-history
- **operator_operates_mine:** Buckingham Slate Company LLC → Boxley Arvonia Quarry; 2008-11-13 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Wallace Brad  Jones  et al → Boxley Arvonia Quarry; 2008-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wallace Brad  Jones  et al → Buckingham Slate Company LLC; 2008-11-13 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark W  Claud  et al → Buckingham Slate Company LLC; 2008-11-13 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Boxley Arvonia Quarry; 2016-03-21 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Boxley Materials Company → Boxley Arvonia Quarry; 2018-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boxley Materials Co → Boxley Materials Company; 2018-06-01 to 2016-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Boxley Materials Company; 2018-06-01 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → Boxley Arvonia Quarry; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → Boxley Materials Company; 2025-02-10 to current/open; source msha-controller-operator-history