# Relationship history for MSHA mine 4101849

Current hierarchy: **Arcosa, Inc → Trinity Materials, Inc. → Beckett S & G Pit**

- 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

- **operator_operates_mine:** Txi (A/K/A Texas Industries Inc) → Beckett S & G Pit; 1950-01-01 to 2004-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Texas Industries Inc → Beckett S & G Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → Txi (A/K/A Texas Industries Inc); 1950-01-01 to 2004-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Beckett S & G Pit; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Texas Industries Inc → Beckett S & G Pit; 2004-12-01 to 2014-07-01; source msha-controller-operator-history
- **operator_operates_mine:** TXI Operations LP → Beckett S & G Pit; 2004-12-15 to 2011-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → TXI Operations LP; 2004-12-15 to 2011-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Materials, Inc. → Beckett S & G Pit; 2011-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Trinity Materials, Inc.; 2011-04-02 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Beckett S & G Pit; 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 2011-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Beckett S & G Pit; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Trinity Materials, Inc.; 2018-11-01 to current/open; source msha-controller-operator-history