# Relationship history for MSHA mine 4104243

Current hierarchy: **Kenneth  Lewis; Carol  Lewis → Central Crushers Inc → Summit 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:** William Clay  Coleman → Summit Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenn  Fuqua → Summit Quarry; 1982-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S H Tolliver Company → Summit Quarry; 2000-12-01 to 2002-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Tolliver → Summit Quarry; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Tolliver → S H Tolliver Company; 2000-12-01 to 2002-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Glenn Fuqua, Inc. → Summit Quarry; 2002-06-03 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Fuqua → Glenn Fuqua, Inc.; 2002-06-03 to 2003-12-31; source msha-controller-operator-history
- **operator_operates_mine:** South Texas Aggregates, Inc. → Summit Quarry; 2004-01-01 to 2008-10-02; source msha-controller-operator-history
- **controller_controls_operator:** William Clay  Coleman → South Texas Aggregates, Inc.; 2004-01-01 to 2008-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Central Crushers Inc → Summit Quarry; 2008-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Lewis  et al → Summit Quarry; 2008-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Lewis  et al → Central Crushers Inc; 2008-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carol  Lewis  et al → Central Crushers Inc; 2008-10-03 to current/open; source msha-controller-operator-history