# Relationship history for MSHA mine 1500187

Current hierarchy: **Arcosa, Inc → ARCOSA LW KY, LLC → Arcosa Brooks Plant #1682**

- 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:** Kentucky Solite Corporation → Arcosa Brooks Plant #1682; 1978-03-09 to 2017-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Northeast Solite Corp → Arcosa Brooks Plant #1682; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northeast Solite Corp → Kentucky Solite Corporation; 1978-03-09 to 2017-05-14; source msha-controller-operator-history
- **operator_operates_mine:** ARCOSA LW KY, LLC → Arcosa Brooks Plant #1682; 2017-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Arcosa Brooks Plant #1682; 2017-05-15 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → ARCOSA LW KY, LLC; 2017-05-15 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Arcosa Brooks Plant #1682; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → ARCOSA LW KY, LLC; 2018-11-01 to current/open; source msha-controller-operator-history