# Relationship history for MSHA mine 4103040

Current hierarchy: **Amrize Ltd → Lattimore Materials Company LP → Bridgeport Rock Crusher**

- 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:** Lattimore Properties Inc → Bridgeport Rock Crusher; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Larry L  Stewart et al → Bridgeport Rock Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stewart Stone Inc → Bridgeport Rock Crusher; 1980-12-01 to 1983-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Larry L  Stewart et al → Stewart Stone Inc; 1980-12-01 to 1983-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Chief Stone → Bridgeport Rock Crusher; 1983-02-01 to 1985-11-28; source msha-controller-operator-history
- **controller_controls_mine:** Lucien N  Hines → Bridgeport Rock Crusher; 1983-02-01 to 1985-11-28; source msha-controller-operator-history
- **controller_controls_operator:** Lucien N  Hines → Chief Stone; 1983-02-01 to 1985-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Lattimore Materials Company LP → Bridgeport Rock Crusher; 1985-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Lattimore Materials Company LP; 1985-11-29 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Bridgeport Rock Crusher; 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 → Bridgeport Rock Crusher; 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 → Bridgeport Rock Crusher; 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