# Relationship history for MSHA mine 4105169

Current hierarchy: **Arcosa, Inc → ACG Materials → Garrett # 1893**

- 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

- **operator_operates_mine:** CRB Limestone LLC → Garrett # 1893; 2016-01-19 to 2019-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Clarence R  Bodiford → Garrett # 1893; 2016-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clarence R  Bodiford → CRB Limestone LLC; 2016-01-19 to 2019-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Garrett # 1893; 2018-12-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ACG Materials → Garrett # 1893; 2019-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → ACG Materials; 2019-07-02 to current/open; source msha-controller-operator-history