# Relationship history for MSHA mine 1200254

Current hierarchy: **Arcosa, Inc → ARCOSA LW HPB, LLC → Arcosa Brooklyn Plant #1683**

- 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:** Hydraulic Press Brick Company → Arcosa Brooklyn Plant #1683; 1950-01-01 to 2017-09-30; source msha-controller-operator-history
- **controller_controls_mine:** St Louis Steel Casting Inc → Arcosa Brooklyn Plant #1683; 1950-01-01 to 2000-08-24; source msha-controller-operator-history
- **controller_controls_operator:** St Louis Steel Casting Inc → Hydraulic Press Brick Company; 1950-01-01 to 2000-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Schwarz Partners II LP → Arcosa Brooklyn Plant #1683; 2000-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schwarz Partners II LP → Hydraulic Press Brick Company; 2000-08-25 to 2017-09-30; source msha-controller-operator-history
- **operator_operates_mine:** ARCOSA LW HPB, LLC → Arcosa Brooklyn Plant #1683; 2017-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Arcosa Brooklyn Plant #1683; 2017-10-01 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → ARCOSA LW HPB, LLC; 2017-10-01 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Arcosa Brooklyn Plant #1683; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → ARCOSA LW HPB, LLC; 2018-11-01 to current/open; source msha-controller-operator-history