# Relationship history for MSHA mine 4102946

Current hierarchy: **Arcosa, Inc → Arcosa Aggregates Texas, LLC → Malloy Bridge Plant 1201**

- 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:** Sam Bernal Inc → Malloy Bridge Plant 1201; 1979-11-01 to 1980-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Sam  Bernal → Malloy Bridge Plant 1201; 1979-11-01 to 1980-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Bernal → Sam Bernal Inc; 1979-11-01 to 1980-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Myre Construction Company → Malloy Bridge Plant 1201; 1980-08-19 to 1993-09-30; source msha-controller-operator-history
- **controller_controls_mine:** William (Danny)  Myre  et al → Malloy Bridge Plant 1201; 1980-08-19 to 1993-09-30; source msha-controller-operator-history
- **controller_controls_operator:** William (Danny)  Myre  et al → Myre Construction Company; 1980-08-19 to 1993-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Malloy Bridge Plant 1201; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Arcosa Aggregates,Inc → Malloy Bridge Plant 1201; 1993-10-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Arcosa Aggregates,Inc; 1993-10-01 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Malloy Bridge Plant 1201; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Arcosa Aggregates,Inc; 2018-11-01 to 2022-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Arcosa Aggregates Texas, LLC → Malloy Bridge Plant 1201; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Malloy Bridge Plant 1201; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Arcosa Aggregates Texas, LLC; 2023-01-01 to current/open; source msha-controller-operator-history