# Relationship history for MSHA mine 3400056

Current hierarchy: **Amrize Ltd → Amrize South Central Inc. → Amrize Stringtown 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:** Lattimore Properties Inc → Amrize Stringtown Quarry; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Amis Materials Company → Amrize Stringtown Quarry; 1950-01-01 to 1996-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Wilburn D  Amis Jr → Amrize Stringtown Quarry; 1950-01-01 to 1996-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Wilburn D  Amis Jr → Amis Materials Company; 1950-01-01 to 1996-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Amis/Otac → Amrize Stringtown Quarry; 1996-02-21 to 1998-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Cel Industries Inc  et al → Amrize Stringtown Quarry; 1996-02-21 to 1998-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Cel Industries Inc  et al → Amis/Otac; 1996-02-21 to 1998-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Stringtown Materials LP → Amrize Stringtown Quarry; 1998-11-20 to 2007-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Lattimore Properties Inc → Amrize Stringtown Quarry; 1998-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Stringtown Materials LP; 1998-11-20 to 2007-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Amrize South Central Inc. → Amrize Stringtown Quarry; 2007-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Amrize South Central Inc.; 2007-10-01 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Stringtown Quarry; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Stringtown Quarry; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Stringtown Quarry; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize South Central Inc.; 2025-06-23 to current/open; source msha-controller-operator-history