# Relationship history for MSHA mine 1519561

Current hierarchy: **Arcosa, Inc → Winn Materials → Grand Rivers Quarry 1373**

- 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:** CALX Resources, LLC → Grand Rivers Quarry 1373; 2011-02-21 to 2015-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Billy  Harper → Grand Rivers Quarry 1373; 2011-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy  Harper → CALX Resources, LLC; 2011-02-21 to 2015-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Winn Materials → Grand Rivers Quarry 1373; 2015-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** VantaCore Partners LP et al → Grand Rivers Quarry 1373; 2015-07-29 to 2018-12-10; source msha-controller-operator-history
- **controller_controls_operator:** VantaCore Partners LP et al → Winn Materials; 2015-07-29 to 2018-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Sun Capital Partners Inc → Grand Rivers Quarry 1373; 2018-12-11 to 2021-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Sun Capital Partners Inc → Winn Materials; 2018-12-11 to 2021-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Grand Rivers Quarry 1373; 2021-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Winn Materials; 2021-04-06 to current/open; source msha-controller-operator-history