# Relationship history for MSHA mine 2902514

Current hierarchy: **Montana  Levacy → Rock Solid Materials LLC → Levacy Portable**

- 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:** Tina  Dziuk et al → Levacy Portable; 2017-01-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Rock Crushing LLC → Levacy Portable; 2020-09-02 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Tina  Dziuk et al → White Rock Crushing LLC; 2020-09-02 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Maldonado et al → White Rock Crushing LLC; 2020-09-02 to 2024-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Rock Solid Materials LLC → Levacy Portable; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Montana  Levacy → Levacy Portable; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Montana  Levacy → Rock Solid Materials LLC; 2024-04-15 to current/open; source msha-controller-operator-history