# Relationship history for MSHA mine 1601244

Current hierarchy: **Arcosa, Inc → Trinity Materials Inc → Plant #392**

- 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:** Charles R  Addison → Plant #392; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Plant #392; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Quick Sand & Gravel Inc → Plant #392; 1992-07-01 to 1998-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Addison → Quick Sand & Gravel Inc; 1992-07-01 to 1998-04-26; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Materials Inc → Plant #392; 1998-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Trinity Materials Inc; 1998-04-27 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Plant #392; 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