# Relationship history for MSHA mine 4103949

Current hierarchy: **Amrize Ltd → Lattimore Materials Company Lp → ENNIS SAND PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lattimore Properties Inc → ENNIS SAND PLANT; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Windham Enterprises Llc → ENNIS SAND PLANT; 1997-04-01 to 1999-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Brian N  Windham → ENNIS SAND PLANT; 1997-04-01 to 1999-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Brian N  Windham → Windham Enterprises Llc; 1997-04-01 to 1999-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Lattimore Materials Company Lp → ENNIS SAND PLANT; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Lattimore Materials Company Lp; 1999-05-01 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → ENNIS SAND PLANT; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lattimore Materials Company Lp; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → ENNIS SAND PLANT; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lattimore Materials Company Lp; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → ENNIS SAND PLANT; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Lattimore Materials Company Lp; 2025-06-23 to current/open; source msha-controller-operator-history