# Relationship history for MSHA mine 0405308

Current hierarchy: **Vulcan Materials Company → North American Recycling and Crushing LLC. → Portable Plant 8**

- 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:** Rock Structures Construction → Portable Plant 8; 1997-04-01 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Antonio  Paredes → Portable Plant 8; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonio  Paredes → Rock Structures Construction; 1997-04-01 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Portable Plant 8; 2018-10-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North American Recycling and Crushing LLC. → Portable Plant 8; 2023-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → North American Recycling and Crushing LLC.; 2023-05-18 to current/open; source msha-controller-operator-history