# Relationship history for MSHA mine 4104113

Current hierarchy: **Arcosa, Inc → Arcosa Aggregates, Inc. → Wills Point Plant 1213**

- 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:** Trinity Industries Inc → Wills Point Plant 1213; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Armor Materials → Wills Point Plant 1213; 1999-08-01 to 2007-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Tyler Asphalt Ltd Et Al → Wills Point Plant 1213; 1999-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler Asphalt Ltd Et Al → Armor Materials; 1999-08-01 to 2007-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Armor Aggregates Ltd → Wills Point Plant 1213; 2007-04-02 to 2008-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Wills Point Plant 1213; 2007-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Armor Aggregates Ltd; 2007-04-02 to 2008-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Arcosa Aggregates, Inc. → Wills Point Plant 1213; 2008-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Arcosa Aggregates, Inc.; 2008-02-07 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Wills Point Plant 1213; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Arcosa Aggregates, Inc.; 2018-11-01 to current/open; source msha-controller-operator-history