# Relationship history for MSHA mine 0203109

Current hierarchy: **Arcosa, Inc → Southwest Rock Products LLC → Portable # 2**

- 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:** Rochelle  Reinesch et al → Portable # 2; 1999-06-01 to 2005-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Rock Products LLC → Portable # 2; 2005-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris J  Reinesch et al → Portable # 2; 2005-12-19 to 2021-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Chris J  Reinesch et al → Southwest Rock Products LLC; 2005-12-19 to 2021-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Steve J  Hood et al → Southwest Rock Products LLC; 2005-12-19 to 2021-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Rochelle  Reinesch et al → Southwest Rock Products LLC; 2005-12-19 to 2005-12-18; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Reinesch et al → Southwest Rock Products LLC; 2005-12-19 to 2005-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Portable # 2; 2021-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Southwest Rock Products LLC; 2021-08-04 to current/open; source msha-controller-operator-history