# Relationship history for MSHA mine 0801448

Current hierarchy: **AFTA, LLC; Steve  Shaw → Couch Aggregates LLC → Sandhills Plant 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Aggregates Holding LLC et al → Sandhills Plant 2; 2017-01-31 to 2020-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Green Rock Mining LLC → Sandhills Plant 2; 2020-10-16 to 2024-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Couch Aggregates LLC → Sandhills Plant 2; 2023-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregates Holding LLC et al → Couch Aggregates LLC; 2023-05-11 to 2020-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Dunn Investment Company et al → Couch Aggregates LLC; 2023-05-11 to 2020-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Green Rock Mining LLC → Couch Aggregates LLC; 2023-05-11 to 2024-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Shaw et al → Sandhills Plant 2; 2024-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Shaw et al → Couch Aggregates LLC; 2024-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** AFTA, LLC et al → Couch Aggregates LLC; 2024-07-12 to current/open; source msha-controller-operator-history