# Relationship history for MSHA mine 4503239

Current hierarchy: **Arcosa, Inc → Arcosa Specialty Materials → Arcosa Specialty Materials Seattle #1890**

- 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:** J A Jack & Sons Inc → Arcosa Specialty Materials Seattle #1890; 1991-05-01 to 2018-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Sharon  Jack et al → Arcosa Specialty Materials Seattle #1890; 1991-05-01 to 2015-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Sharon  Jack et al → J A Jack & Sons Inc; 1991-05-01 to 2015-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Linda  Jack Liebich et al → J A Jack & Sons Inc; 1991-05-01 to 2015-02-24; source msha-controller-operator-history
- **controller_controls_mine:** H I G Capital LLC → Arcosa Specialty Materials Seattle #1890; 2015-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** H I G Capital LLC → J A Jack & Sons Inc; 2015-02-25 to 2018-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Arcosa Specialty Materials → Arcosa Specialty Materials Seattle #1890; 2018-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Arcosa Specialty Materials Seattle #1890; 2018-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Arcosa Specialty Materials; 2018-12-06 to current/open; source msha-controller-operator-history