# Relationship history for MSHA mine 0504415

Current hierarchy: **Arcosa, Inc → ARCOSA LWB, LLC → Arcosa Boulder Plant #1604**

- 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:** Texas Industries Inc → Arcosa Boulder Plant #1604; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Aggregates → Arcosa Boulder Plant #1604; 1989-12-01 to 1997-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Inco Ltd → Arcosa Boulder Plant #1604; 1989-12-01 to 1997-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Inco Ltd → Western Aggregates; 1989-12-01 to 1997-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Texas Industries → Arcosa Boulder Plant #1604; 1997-11-25 to 2005-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → Texas Industries; 1997-11-25 to 2005-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Texas Industries Inc → Arcosa Boulder Plant #1604; 2004-12-01 to 2014-07-01; source msha-controller-operator-history
- **operator_operates_mine:** TXI Operations LP → Arcosa Boulder Plant #1604; 2005-03-15 to 2013-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → TXI Operations LP; 2005-03-15 to 2013-03-22; source msha-controller-operator-history
- **operator_operates_mine:** ARCOSA LWB, LLC → Arcosa Boulder Plant #1604; 2013-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Arcosa Boulder Plant #1604; 2013-03-23 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → ARCOSA LWB, LLC; 2013-03-23 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Arcosa Boulder Plant #1604; 2014-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → TXI Operations LP; 2014-07-02 to 2013-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Arcosa Boulder Plant #1604; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → ARCOSA LWB, LLC; 2018-11-01 to current/open; source msha-controller-operator-history