# Relationship history for MSHA mine 4103920

Current hierarchy: **Eagle Materials Inc → Centex Materials LP → Georgetown**

- 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:** Eagle Materials Inc → Georgetown; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Highway 195 Crushed Stone Inc → Georgetown; 1996-07-01 to 1999-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Priscilla  Yearwood → Georgetown; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Priscilla  Yearwood → Highway 195 Crushed Stone Inc; 1996-07-01 to 1999-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Centex Materials LP → Georgetown; 1999-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Materials Inc → Centex Materials LP; 1999-06-03 to current/open; source msha-controller-operator-history