# Relationship history for MSHA mine 4101163

Current hierarchy: **Arcosa, Inc → Trinity Materials Inc → Seagoville S & G Plant 280**

- 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:** Trinity Metroplex Div-General Portland Inc → Seagoville S & G Plant 280; 1950-01-01 to 1981-11-11; source msha-controller-operator-history
- **controller_controls_mine:** General Portland Inc → Seagoville S & G Plant 280; 1950-01-01 to 1981-11-11; source msha-controller-operator-history
- **controller_controls_operator:** General Portland Inc → Trinity Metroplex Div-General Portland Inc; 1950-01-01 to 1981-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Seagoville S & G Plant 280; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → Seagoville S & G Plant 280; 1981-11-12 to 1994-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1981-11-12 to 1994-12-15; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Seagoville S & G Plant 280; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Materials Inc → Seagoville S & G Plant 280; 1994-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Trinity Materials Inc; 1994-12-16 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Seagoville S & G Plant 280; 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